HomeDocs changes
Documentation changes
What the docs quietly changed.
Anthropic's published documentation, fetched on a schedule and diffed against the last copy. Every edit dated, including the ones that never made a release note.
Last poll read all 4 cleanly: Claude Code CLI, Claude Developer Platform, Claude Documentation, Model Context Protocol. A date here is when this site noticed, not when Anthropic edited.
Claude Developer Platform
808pages tracked
587 changed this week · last read 22 Oct 2026
Claude Code CLI
228pages tracked
146 changed this week · last read 22 Oct 2026
Claude Documentation
278pages tracked
74 changed this week · last read 22 Oct 2026
Model Context Protocol
357pages tracked
163 changed this week · last read 21 Oct 2026
100 on this page
9,144 of the ledger's changes in api. Show every change
ReadSourcePageWhatLines
24 Aug 2026
95 pages
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api
manage-claude/inference-hooks-endpoint
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manage-claude/inference-hooks-endpoint
Each trip is recorded as an `inference_hooks_circuit_breaker_tripped` activity in the [Activity Feed](https://platform.claude.com/docs/en/manage-claude/compliance-activity-feed), o
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manage-claude/inference-hooks-configuration
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manage-claude/inference-hooks-configuration
Each trip is also recorded in your organization's [Activity Feed](https://platform.claude.com/docs/en/manage-claude/compliance-activity-feed) as an `inference_hooks_circuit_breaker
Inference hooks activity is recorded in your organization's [Activity Feed](https://platform.claude.com/docs/en/manage-claude/compliance-activity-feed): configuration changes, deni
Inference hooks activity is recorded in your organization's [Activity Feed](https://platform.claude.com/docs/en/manage-claude/compliance-activity-feed): configuration changes, deni
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manage-claude/inference-hooks
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manage-claude/inference-hooks
Your AI security server sees what the user sees: transcript text, tool calls and their results, and text extracted from attachments. It never receives raw file or image bytes, syst
Your AI security server sees what the user sees: transcript text, tool calls and their results, and text extracted from attachments. It never receives raw file or image bytes, syst
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manage-claude/compliance-sessions
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manage-claude/compliance-sessions
The following table summarizes how [local sessions](https://platform.claude.com/docs/en/manage-claude/compliance-sessions#retrieve-local-sessions) and [remote sessions](https://pla
| | Local sessions (on users' machines) | Remote sessions (in the cloud)
| ------------------------ | -------------------------------------------------------------------------------------------------------- | --------------------------------------------
| Endpoints | List, retrieve, and messages endpoints under `/v1/compliance/apps/sessions/local` | List and messages endpoints under `/v1/compl
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manage-claude/compliance-integration-patterns
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manage-claude/compliance-integration-patterns
* Activities are queryable within 1 minute of occurring and retained for 6 years.
* Activities are queryable within 1 minute of occurring and retained for 6 years. Recording is not retroactive: it begins when the Compliance API is first enabled for your organiza
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manage-claude/compliance-faq
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manage-claude/compliance-faq
Yes. When the Compliance API is turned off (or back on) in Claude Console, the change is recorded as an organization settings-updated activity in the [Activity Feed](https://pl
Yes. When the Compliance API is turned off (or back on) in Claude Console, the change is recorded as an `org_compliance_api_settings_updated` activity in the [Activity Feed](ht
To access content endpoints, the primary owner of your parent organization (or an organization owner, for their own organization only) must [create a Compliance Access Key](htt
To access content endpoints, the primary owner of your parent organization (or an organization owner, for their own organization only) must [create a Compliance Access Key](htt
The Activity Feed retains 6 years of organization activity, and new events are queryable within 1 minute of occurring. Activity Feed retention is independent of your organizati
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manage-claude/compliance-errors
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manage-claude/compliance-errors
The key in `x-api-key` is valid but does not carry the scope the endpoint requires. The verbatim message lists the scopes the key carries (`Got:`) and the scopes the endpoint requi
The key in `x-api-key` is valid but does not carry the scope the endpoint requires. The verbatim message lists the scopes the key carries (`Got:`) and the scopes the endpoint requi
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manage-claude/compliance-content-data
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manage-claude/compliance-content-data
To scope the list to specific users instead (for example, a legal hold on named custodians), pass 1–10 `user_ids[]` values. Obtain the IDs from [List organization users](https://pl
To scope the list to specific users instead (for example, a legal hold on named custodians), pass 1–10 `user_ids[]` values. Obtain the IDs from [List organization users](https://pl
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manage-claude/compliance-api
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manage-claude/compliance-api
[Cowork's OpenTelemetry logging](https://support.claude.com/en/articles/14477985-monitor-claude-cowork-activity-with-opentelemetry) and [Claude Code monitoring](https://code.claude
[Cowork's OpenTelemetry logging](https://support.claude.com/en/articles/14477985-monitor-claude-cowork-activity-with-opentelemetry) and [Claude Code monitoring](https://code.claude
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manage-claude/compliance-activity-feed
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manage-claude/compliance-activity-feed
The Activity Feed records authentication, chat, file, project, administrative, and platform activity across your organization and returns it in reverse chronological order. Activit
The Activity Feed records authentication, chat, file, project, administrative, and platform activity across your organization and returns it in reverse chronological order. Activit
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api
manage-claude/cmek
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manage-claude/cmek
* Search across large numbers of files is slower.
* [Project knowledge search](https://support.claude.com/en/articles/11473015-retrieval-augmented-generation-rag-for-projects) (retrieval-augmented generation, or RAG) is disabled.
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api
intro
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intro
[See the models overview](https://platform.claude.com/docs/en/about-claude/models/overview)
[See the models overview](https://platform.claude.com/docs/en/models/overview)
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home
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home
<HomeJourneyLink icon="settings" href="https://platform.claude.com/docs/en/about-claude/models/overview">
<HomeJourneyLink icon="settings" href="https://platform.claude.com/docs/en/models/overview">
<HomeModelCard name="Fable 5" badge="Most capable" modelId="claude-fable-5" description="Highest capability for the most demanding reasoning and long-horizon agentic work." h
<HomeModelCard name="Opus 5" badge="Advanced" modelId="claude-opus-5" description="Excellent for complex analysis, coding, and creative tasks requiring deep reasoning." href=
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api
get-started
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get-started
<Card title="Models overview" icon="brain" href="https://platform.claude.com/docs/en/about-claude/models/overview">
<Card title="Models overview" icon="brain" href="https://platform.claude.com/docs/en/models/overview">
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cli-sdks-libraries/libraries/openai-sdk
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cli-sdks-libraries/libraries/openai-sdk
* Update your model name to use a [Claude model](https://platform.claude.com/docs/en/about-claude/models/overview)
* Update your model name to use a [Claude model](https://platform.claude.com/docs/en/models/overview)
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cli-sdks-libraries/libraries/apple-foundation-models
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cli-sdks-libraries/libraries/apple-foundation-models
Constants mirror API model IDs (`.opus5` is `claude-opus-5`) and carry each model's capabilities. New models ship as new constants in package releases; check `ClaudeModel` in Xcode
Constants mirror API model IDs (`.opus5` is `claude-opus-5`) and carry each model's capabilities. New models ship as new constants in package releases; check `ClaudeModel` in Xcode
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build-with-claude/token-counting
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build-with-claude/token-counting
All [active models](https://platform.claude.com/docs/en/about-claude/models/overview) support token counting, including Claude Opus 5 and Claude Sonnet 5.
All [active models](https://platform.claude.com/docs/en/models/overview) support token counting, including Claude Opus 5 and Claude Sonnet 5.
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build-with-claude/thinking
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build-with-claude/thinking
On Claude Opus 5, Claude Sonnet 5, Claude Fable 5, Claude Mythos 5, and Claude Mythos Preview, thinking is already on: no configuration needed. The first thing most developers need
On Claude Opus 5, Claude Sonnet 5, Claude Fable 5, Claude Mythos 5, and Claude Mythos Preview, thinking is already on: no configuration needed. The first thing most developers need
**Output limits.** Claude Fable 5, Claude Mythos 5, Claude Mythos Preview, Claude Opus 5, Claude Opus 4.8, Claude Opus 4.7, Claude Sonnet 5, Claude Opus 4.6, and Claude Sonnet 4.6
**Output limits.** Claude Fable 5, Claude Mythos 5, Claude Mythos Preview, Claude Opus 5, Claude Opus 4.8, Claude Opus 4.7, Claude Sonnet 5, Claude Opus 4.6, and Claude Sonnet 4.6
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build-with-claude/search-results
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build-with-claude/search-results
All [active models](https://platform.claude.com/docs/en/about-claude/models/overview) support search results with citations, with the exception of Claude Haiku 3. No beta header is
All [active models](https://platform.claude.com/docs/en/models/overview) support search results with citations, with the exception of Claude Haiku 3. No beta header is required: se
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build-with-claude/prompt-engineering/prompting-claude-sonnet-5
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build-with-claude/prompt-engineering/prompting-claude-sonnet-5
This guide covers the prompting patterns specific to Claude Sonnet 5. For the model's capabilities and API changes, see [What's new in Claude Sonnet 5](https://platform.claude.com/
This guide covers the prompting patterns specific to Claude Sonnet 5. For the model's capabilities and API changes, see [What's new in Claude Sonnet 5](https://platform.claude.com/
If you are running Claude Sonnet 5 at `high`, `xhigh`, or `max` effort, leave headroom in `max_tokens` so the model has room for thinking and tool calls. On long tasks, adaptive
If you are running Claude Sonnet 5 at `high`, `xhigh`, or `max` effort, leave headroom in `max_tokens` so the model has room for thinking and tool calls. On long tasks, adaptive
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build-with-claude/prompt-engineering/prompting-claude-opus-5
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build-with-claude/prompt-engineering/prompting-claude-opus-5
This guide covers the prompting patterns specific to Claude Opus 5. For the model's capabilities and API changes, see [What's new in Claude Opus 5](https://platform.claude.com/docs
This guide covers the prompting patterns specific to Claude Opus 5. For the model's capabilities and API changes, see [What's new in Claude Opus 5](https://platform.claude.com/docs
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build-with-claude/prompt-engineering/prompting-claude-fable-5
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build-with-claude/prompt-engineering/prompting-claude-fable-5
This guide covers the prompting and scaffolding patterns specific to Claude Fable 5 and Claude Mythos 5. For the model's capabilities, API changes, pricing, and availability, see [
This guide covers the prompting and scaffolding patterns specific to Claude Fable 5 and Claude Mythos 5. For the model's capabilities, API changes, pricing, and availability, see [
For API parameter changes specific to Claude Fable 5 and Claude Mythos 5 (adaptive thinking only, summarized-only thinking output, no extended thinking budgets, the `refusal` sto
For API parameter changes specific to Claude Fable 5 and Claude Mythos 5 (adaptive thinking only, summarized-only thinking output, no extended thinking budgets, the `refusal` sto
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api
build-with-claude/prompt-engineering/claude-prompting-best-practices
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build-with-claude/prompt-engineering/claude-prompting-best-practices
For an overview of model capabilities, see the [models overview](https://platform.claude.com/docs/en/about-claude/models/overview). For Claude Fable 5 capabilities and API change
For an overview of model capabilities, see the [models overview](https://platform.claude.com/docs/en/models/overview). For Claude Fable 5 capabilities and API changes, see [Intro
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build-with-claude/prompt-caching
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build-with-claude/prompt-caching
Prompt caching (both automatic and explicit) is supported on all [active Claude models](https://platform.claude.com/docs/en/about-claude/models/overview).
Prompt caching (both automatic and explicit) is supported on all [active Claude models](https://platform.claude.com/docs/en/models/overview).
Prompt caching is supported on all [active Claude models](https://platform.claude.com/docs/en/about-claude/models/overview).
Prompt caching is supported on all [active Claude models](https://platform.claude.com/docs/en/models/overview).
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build-with-claude/pdf-support
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build-with-claude/pdf-support
All [active models](https://platform.claude.com/docs/en/about-claude/models/overview) support PDF processing. For PDF support through Amazon Bedrock's Converse API, see [Amazon Bed
All [active models](https://platform.claude.com/docs/en/models/overview) support PDF processing. For PDF support through Amazon Bedrock's Converse API, see [Amazon Bedrock PDF supp
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build-with-claude/multilingual-support
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build-with-claude/multilingual-support
<Card title="Models overview" icon="table" href="https://platform.claude.com/docs/en/about-claude/models/overview">
<Card title="Models overview" icon="table" href="https://platform.claude.com/docs/en/models/overview">
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build-with-claude/context-windows
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build-with-claude/context-windows
See the [model comparison](https://platform.claude.com/docs/en/about-claude/models/overview#latest-models-comparison) table for a list of context window sizes by model.
See the [model comparison](https://platform.claude.com/docs/en/models/overview#latest-models-comparison) table for a list of context window sizes by model.
<Card title="Model comparison table" icon="scales" href="https://platform.claude.com/docs/en/about-claude/models/overview#latest-models-comparison">
<Card title="Model comparison table" icon="scales" href="https://platform.claude.com/docs/en/models/overview#latest-models-comparison">
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build-with-claude/claude-in-amazon-bedrock
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build-with-claude/claude-in-amazon-bedrock
Model IDs in Claude in Amazon Bedrock carry an `anthropic.` provider prefix. Model capabilities and behaviors are documented on the [Models overview](https://platform.claude.com/do
Model IDs in Claude in Amazon Bedrock carry an `anthropic.` provider prefix. Model capabilities and behaviors are documented on the [Models overview](https://platform.claude.com/do
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build-with-claude/citations
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build-with-claude/citations
All [active models](https://platform.claude.com/docs/en/about-claude/models/overview) support citations.
All [active models](https://platform.claude.com/docs/en/models/overview) support citations.
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build-with-claude/batch-processing
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build-with-claude/batch-processing
All [active models](https://platform.claude.com/docs/en/about-claude/models/overview) support the Message Batches API.
All [active models](https://platform.claude.com/docs/en/models/overview) support the Message Batches API.
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api/service-tiers
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api/service-tiers
Check the [Models overview](https://platform.claude.com/docs/en/about-claude/models/overview) for more details on available models.
Check the [Models overview](https://platform.claude.com/docs/en/models/overview) for more details on available models.
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api/compliance/organizations/settings/retrieve
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api/compliance/organizations/settings/retrieve
- `name: "ai_powered_artifacts_enabled" or "api_workbench_feedback_collection_enabled" or "artifact_connectors_enabled" or 43 more`
- `name: "ai_powered_artifacts_enabled" or "api_workbench_feedback_collection_enabled" or "artifact_connectors_enabled" or 44 more`
- `"group_skill_sharing_enabled"`
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api/compliance/organizations/settings
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api/compliance/organizations/settings
- `name: "ai_powered_artifacts_enabled" or "api_workbench_feedback_collection_enabled" or "artifact_connectors_enabled" or 43 more`
- `name: "ai_powered_artifacts_enabled" or "api_workbench_feedback_collection_enabled" or "artifact_connectors_enabled" or 44 more`
- `"group_skill_sharing_enabled"`
- `name: "ai_powered_artifacts_enabled" or "api_workbench_feedback_collection_enabled" or "artifact_connectors_enabled" or 43 more`
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api/compliance/organizations
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api/compliance/organizations
- `name: "ai_powered_artifacts_enabled" or "api_workbench_feedback_collection_enabled" or "artifact_connectors_enabled" or 43 more`
- `name: "ai_powered_artifacts_enabled" or "api_workbench_feedback_collection_enabled" or "artifact_connectors_enabled" or 44 more`
- `"group_skill_sharing_enabled"`
- `name: "ai_powered_artifacts_enabled" or "api_workbench_feedback_collection_enabled" or "artifact_connectors_enabled" or 43 more`
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api/compliance/apps/sessions/local/retrieve
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api/compliance/apps/sessions/local/retrieve
- `updated_at: string`
Timestamp of the session's last retained inference call (RFC 3339, UTC). Always at or after `created_at`. When a session's activity spans the child organization's retention bound
"created_at": "2026-07-09T14:02:11Z"
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api/compliance/apps/sessions/local/messages/list
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api/compliance/apps/sessions/local/messages/list
- `data: array of object { id, content, created_at, 3 more }`
Transcript turns for this page, ordered by `created_at` in the direction selected by the `order` parameter (ascending by default). Turns sharing a `created_at` (all messages of o
- `data: array of object { id, content, created_at, 4 more }`
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api/compliance/apps/sessions/local/messages
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api/compliance/apps/sessions/local/messages
- `data: array of object { id, content, created_at, 3 more }`
Transcript turns for this page, ordered by `created_at` in the direction selected by the `order` parameter (ascending by default). Turns sharing a `created_at` (all messages of o
- `data: array of object { id, content, created_at, 4 more }`
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api/compliance/apps/sessions/local/list
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api/compliance/apps/sessions/local/list
- `updated_at: optional object { gte }`
- `gte: optional string`
Only return sessions whose last inference call is at or after this time (RFC 3339; a UTC offset is required). Combines with `created_at.gte` / `created_at.lt`; the ordering and
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api/compliance/apps/sessions/local
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api/compliance/apps/sessions/local
- `updated_at: optional object { gte }`
- `gte: optional string`
Only return sessions whose last inference call is at or after this time (RFC 3339; a UTC offset is required). Combines with `created_at.gte` / `created_at.lt`; the ordering and
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api/compliance/apps/sessions
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api/compliance/apps/sessions
- `updated_at: optional object { gte }`
- `gte: optional string`
Only return sessions whose last inference call is at or after this time (RFC 3339; a UTC offset is required). Combines with `created_at.gte` / `created_at.lt`; the ordering and
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api/compliance/apps/chats/messages/list
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api/compliance/apps/chats/messages/list
Model selected for this chat (e.g. 'claude-opus-4-7'). May be null for legacy chats that never had a model recorded.
Model selected for this chat (e.g. 'claude-opus-5'). May be null for legacy chats that never had a model recorded.
"organization_uuid": "abcdef0123-4567-89ab-cdef-0123456789ab",
"organization_uuid": "abcdef01-2345-6789-abcd-ef0123456789",
"model": "claude-opus-4-7",
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api/compliance/apps/chats/messages
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api/compliance/apps/chats/messages
Model selected for this chat (e.g. 'claude-opus-4-7'). May be null for legacy chats that never had a model recorded.
Model selected for this chat (e.g. 'claude-opus-5'). May be null for legacy chats that never had a model recorded.
"organization_uuid": "abcdef0123-4567-89ab-cdef-0123456789ab",
"organization_uuid": "abcdef01-2345-6789-abcd-ef0123456789",
"model": "claude-opus-4-7",
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api/compliance/apps/chats/list
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api/compliance/apps/chats/list
**Deprecation notice:** Combining `user_ids[]` with any `updated_at.*`
filter is deprecated and will be rejected with HTTP 400 after
2026-09-22. For incremental polling by update time, omit `user_ids[]`
and set `order_by=updated_at` with `after_id` cursor pagination —
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api/compliance/apps/chats
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api/compliance/apps/chats
**Deprecation notice:** Combining `user_ids[]` with any `updated_at.*`
filter is deprecated and will be rejected with HTTP 400 after
2026-09-22. For incremental polling by update time, omit `user_ids[]`
and set `order_by=updated_at` with `after_id` cursor pagination —
this returns the same chats across the whole organization in a single
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api/compliance/apps
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api/compliance/apps
**Deprecation notice:** Combining `user_ids[]` with any `updated_at.*`
filter is deprecated and will be rejected with HTTP 400 after
2026-09-22. For incremental polling by update time, omit `user_ids[]`
and set `order_by=updated_at` with `after_id` cursor pagination —
this returns the same chats across the whole organization in a single
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api/compliance/activities/list
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api/compliance/activities/list
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api/compliance/activities
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api/compliance/activities
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api/compliance
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api/compliance
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agents-and-tools/tool-use/overview
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agents-and-tools/tool-use/overview
See the [Models overview](https://platform.claude.com/docs/en/about-claude/models/overview#latest-models-comparison) table for current per-model prices.
See the [Models overview](https://platform.claude.com/docs/en/models/overview#latest-models-comparison) table for current per-model prices.
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In this example, the `batch_moderate_messages` function handles the moderation of an entire batch of messages with a single Claude API call. Inside the function, a prompt is create
In this example, the `batch_moderate_messages` function handles the moderation of an entire batch of messages with a single Claude API call. Inside the function, a prompt is create
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about-claude/models/optimizing-for-cost-and-intelligence
| You are not on the latest model | Upgrade; the current model solves more, usually at lower cost per solved task
These levers set where a single model sits between cost and intelligence: model choice, effort, re-running failures at a higher setting, and the budgets and caps it works within. S
These levers set where a single model sits between cost and intelligence: model choice, effort, re-running failures at a higher setting, and the budgets and caps it works within. S
### Upgrade the model
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For the full list of current model IDs and their Amazon Bedrock and Google Cloud equivalents, see [Models overview](https://platform.claude.com/docs/en/about-claude/models/overview
For the full list of current model IDs and their Amazon Bedrock and Google Cloud equivalents, see [Models overview](https://platform.claude.com/docs/en/models/overview).
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about-claude/models/migration-guide
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about-claude/models/migration-guide
[Claude Fable 5](https://platform.claude.com/docs/en/about-claude/models/introducing-claude-fable-5-and-claude-mythos-5) is Anthropic's most capable widely released model, availabl
[Claude Fable 5](https://platform.claude.com/docs/en/models/fable-5/introducing-claude-fable-5-and-claude-mythos-5) is Anthropic's most capable widely released model, available on
[Claude Mythos 5](https://anthropic.com/glasswing) is the access-gated successor to [Claude Mythos Preview](https://anthropic.com/glasswing), the invitation-only research preview.
[Claude Mythos 5](https://anthropic.com/glasswing) is the access-gated successor to [Claude Mythos Preview](https://anthropic.com/glasswing), the invitation-only research preview.
Claude Fable 5 and Claude Mythos 5 use the same [Messages API](https://platform.claude.com/docs/en/build-with-claude/working-with-messages) and the same [tool use](https://platform
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about-claude/models/choosing-a-model
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about-claude/models/choosing-a-model
**Claude Fable 5** (`claude-fable-5`) is Anthropic's most capable widely released model, delivering next-generation intelligence for long-running agents. **Claude Mythos 5** (`clau
**Claude Fable 5** (`claude-fable-5`) is Anthropic's most capable widely released model, delivering next-generation intelligence for long-running agents. **Claude Mythos 5** (`clau
<Card title="Model comparison chart" icon="settings" href="https://platform.claude.com/docs/en/about-claude/models/overview">
<Card title="Model comparison chart" icon="settings" href="https://platform.claude.com/docs/en/models/overview">
<Card title="What's new in Claude Opus 5" icon="sparkle" href="https://platform.claude.com/docs/en/about-claude/models/whats-new-opus-5">
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release-notes/overview
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release-notes/overview
### August 20, 2026
* We've released **v1.0 of the [Python SDK](https://platform.claude.com/docs/en/cli-sdks-libraries/sdks/python)**. The SDK's HTTP layer moves from `httpx` to [httpx2](https://httpx
* The [computer use tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/computer-use-tool) is now generally available on the Claude API as the `computer_toolset_202
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managed-agents/webhooks
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Some of these events are named differently from the matching events on the session's [event stream](https://platform.claude.com/docs/en/managed-agents/events-and-streaming). Fo
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managed-agents/tools
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managed-agents/tools
* Domains must be ASCII: use the `xn--` (Punycode) form for internationalized domain names. The Messages API accepts Unicode entries, though it recommends against them.
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managed-agents/session-operations
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managed-agents/session-operations
The session must be `idle` to update the agent. [Interrupt](https://platform.claude.com/docs/en/managed-agents/events-and-streaming#integrating-events) the session if you need to u
The session must be `idle` to update the agent. To update the agent while the session is running, send a [`user.interrupt` event](https://platform.claude.com/docs/en/managed-agents
Archive a session to prevent new events from being sent while preserving its history. A `running` session cannot be archived; send an [interrupt event](https://platform.claude.com/
Archive a session to prevent new events from being sent while preserving its history. A `running` session cannot be archived; to archive one, send a [`user.interrupt` event](https:
Delete a session to permanently remove its record, events, and associated sandbox. A `running` session cannot be deleted; send an [interrupt event](https://platform.claude.com/docs
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managed-agents/self-hosted-sandboxes-security
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managed-agents/self-hosted-sandboxes-security
* **Read-only memory stores.** A store attached with `read_only` access is protected from upload, not from local modification. The worker's `write` and `edit` tools refuse to write
* **Read-only memory stores.** A store attached with `read_only` access is protected from upload, not from local modification. The worker's `write` and `edit` tools refuse to write
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managed-agents/scheduled-deployments
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managed-agents/scheduled-deployments
* **DST:** Cron schedules use literal wall-clock matching, so `"0 20 * * *"` in `America/New_York` fires at 8PM local time regardless of whether EST or EDT is in effect.
* **DST:** Cron schedules use literal wall-clock matching, so `"0 20 * * *"` in `America/New_York` fires at 8:00 PM local time regardless of whether EST or EDT is in effect.
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managed-agents/reference
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managed-agents/reference
Persisted event type strings follow a `{domain}.{action}` naming convention; the stream-only event deltas (see the Event deltas tab) are the exception. See [Session event stream](h
Persisted event type strings follow a `{domain}.{action}` naming convention; the stream-only event deltas (see the Event deltas tab) are the exception. See [Session event stream](h
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managed-agents/github
The `resources[].authorization_token` authenticates the repository clone operation and is not echoed in API responses.
A `github_repository` resource accepts the following fields:
| Field | Description
| --------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------
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managed-agents/files
FILE_ID=$(ant files upload \
--file data.csv \
--transform id --raw-output)
FILE_ID=$(ant files upload --file data.csv --transform id --raw-output)
// The PHP SDK exposes the Files API under the beta namespace; field names can differ from other SDKs.
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managed-agents/events-and-streaming
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managed-agents/events-and-streaming
Session, span, agent, user, and system event type strings follow a `{domain}.{action}` naming convention. The stream-only delta preview events (`event_start`, `event_delta`) are th
Session, span, agent, user, and system event type strings follow a `{domain}.{action}` naming convention. The stream-only delta preview events (`event_start`, `event_delta`) are th
The agent acknowledges the interruption and switches to the new task. The interrupted turn ends with a `session.status_idle` event whose `stop_reason` is `end_turn`, the same v
The call returns as soon as the events are queued, and the interrupt's `processed_at` stays null until the agent applies it. A model response in progress stops immediately. The
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managed-agents/environments
ant beta:sessions create \
--agent "$AGENT_ID" \
--environment-id "$ENVIRONMENT_ID"
ant beta:sessions create --agent "$AGENT_ID" --environment-id "$ENVIRONMENT_ID"
| `apt` | System packages (apt-get) | `"ffmpeg"` |
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managed-agents/define-outcomes
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managed-agents/define-outcomes
// The PHP SDK exposes the Files API under the beta namespace; field names can differ from other SDKs.
$rubric = $client->beta->files->upload(
$rubric = $client->files->upload(
ant beta:sessions:events send \
--session-id "$SESSION_ID" <<YAML
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managed-agents/cloud-sandboxes-reference
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managed-agents/cloud-sandboxes-reference
| Language | Version | Package manager |
| -------- | ------- | --------------- |
| Python | 3.12+ | pip, uv |
| Node.js | 20+ | npm, yarn, pnpm |
| Go | 1.22+ | go modules |
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manage-claude/wif-providers/okta
import httpx
import httpx2
response = httpx.post(
response = httpx2.post(
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manage-claude/user-management
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manage-claude/user-management
**The endpoints on this page are generally available for Claude Enterprise organizations.** The [beta header](https://platform.claude.com/docs/en/api/beta-headers) `anthropic-bet
Group and custom-role requests don't require the `anthropic-beta: ce-user-management-2026-07-13` [beta header](https://platform.claude.com/docs/en/api/beta-headers). Requests tha
Two `action` values need special care: an `organization` permission whose action is `capability_access_all` (every product feature) or `capability_access_all_ga` (every generally a
Two `action` values need special care: an `organization` permission whose action is `capability_access_all` (every product feature) or `capability_access_all_ga` (every stable prod
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manage-claude/spend-limits-api
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manage-claude/spend-limits-api
`period` is the recurring window over which the spend limit is enforced and spend resets. A spend limit is identified by its `(scope, period)` pair. Currently `monthly` is the only
`period` is the recurring window over which the spend limit is enforced and spend resets. A spend limit is identified by its `(scope, period)` pair. Currently `monthly` is the only
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manage-claude/inference-hooks-endpoint
Inference hooks are in beta and available to Claude Enterprise organizations. Field names, request shapes, and headers may change before general availability.
Inference hooks are in beta and available to Claude Enterprise organizations. Field names, request shapes, and headers may change during the beta.
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| Compliance API field | Join target |
| --------------------- | ----------------------------------------------- |
| `actor.user_id` | Your identity provider's stable user identifier |
| `actor.email_address` | Directory email when a stable ID is unavailable |
| `actor.ip_address` | Network, VPN, and endpoint logs |
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manage-claude/compliance-faq
Join `Activity` records to your SIEM on `actor.user_id`, `actor.email_address`, `actor.ip_address`, and `created_at`. See [Design your compliance integration](https://platform.
Join `Activity` records to your SIEM on `actor.user_id`, `actor.email_address`, `actor.ip_address`, `actor.user_agent`, and `created_at`. See [Design your compliance integratio
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manage-claude/compliance-activity-feed
The Activity Feed records every authentication, chat, file, project, administrative, and platform action that occurs in your organization, in reverse chronological order. Activitie
The Activity Feed records authentication, chat, file, project, administrative, and platform activity across your organization and returns it in reverse chronological order. Activit
| `admin_api_key_actor` | An organization admin used an Admin API key to manage users, invites, workspaces, or API keys.
| `admin_api_key_actor` | An organization admin used an Admin API key to manage users, invites, workspaces, or API keys.
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manage-claude/cmek
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manage-claude/cmek
* [Personal preferences - Instructions for Claude section](https://claude.ai/new#settings/general). These are set at the account level and shared across all of a user's organizatio
* [Personal preferences - Instructions for Claude section](https://claude.ai/new#settings/general) and Cowork Global instructions. These are set at the account level and shared acr
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**Engagement and adoption endpoints** (user activity, summaries, projects, skills, connectors) return a per-day snapshot for the date you specify. Data for a given day is aggregate
**Engagement and adoption endpoints** (user activity, summaries, projects, skills, connectors) return a per-day snapshot for the date you specify. Data for a given day is aggregate
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home
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home
<HomeCardLink icon="code-brackets" href="https://platform.claude.com/docs/en/api/client-sdks">
<HomeCardLink icon="code-brackets" href="https://platform.claude.com/docs/en/cli-sdks-libraries/overview">
<HomeJourneyLink icon="code-brackets" href="https://platform.claude.com/docs/en/api/client-sdks">
<HomeJourneyLink icon="code-brackets" href="https://platform.claude.com/docs/en/cli-sdks-libraries/overview">
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cli-sdks-libraries/sdks/python
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cli-sdks-libraries/sdks/python
Python 3.9 or later is required.
Python 3.10 or later is required. If you are upgrading from a 0.x release of the SDK, see the [v1 migration guide](https://github.com/anthropics/anthropic-sdk-python/blob/main/MIGR
For improved async performance, you can use the `aiohttp` HTTP backend instead of the default `httpx`:
For improved async performance, you can use the `aiohttp` HTTP backend instead of the default `httpx2`:
print(e.__cause__) # an underlying Exception, likely raised within httpx
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cli-sdks-libraries/libraries/apple-foundation-models
**Beta.** This package targets the Foundation Models server-side language model API introduced in the OS 27 betas. APIs might change before general availability.
**Beta.** This package targets the Foundation Models server-side language model API introduced in the OS 27 betas. APIs might change during the beta.
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FIRST_AGENT=$(ant beta:agents list \
--transform id --raw-output | head -1)
FIRST_AGENT=$(ant beta:agents list --transform id --raw-output | head -1)
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claude_api_primer
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claude_api_primer
import httpx
import httpx2
image_data = base64.standard_b64encode(httpx.get(image_url).content).decode("utf-8")
image_data = base64.standard_b64encode(httpx2.get(image_url).content).decode("utf-8")
ant messages create \
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build-with-claude/working-with-messages
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build-with-claude/working-with-messages
import httpx
import httpx2
image_data = base64.standard_b64encode(httpx.get(image_url).content).decode("utf-8")
image_data = base64.standard_b64encode(httpx2.get(image_url).content).decode("utf-8")
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## Turn resizing into an error with `transformations`
Pre-resizing only protects your coordinates while your pipeline keeps producing the right sizes. A new image source or a switch to a model on a different resolution tier can quietl
```json
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build-with-claude/vision
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// The PHP SDK exposes the Files API under the beta namespace; field names can differ from other SDKs.
// The PHP SDK supports file_id document and image sources only through $client->beta->messages with the files beta.
use Anthropic\Core\FileParam;
$fileUpload = $client->beta->files->upload(
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build-with-claude/token-counting
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build-with-claude/token-counting
import httpx
import httpx2
image_data = base64.standard_b64encode(httpx.get(image_url).content).decode("utf-8")
image_data = base64.standard_b64encode(httpx2.get(image_url).content).decode("utf-8")
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build-with-claude/structured-outputs
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build-with-claude/structured-outputs
**Migrating from beta?** The `output_format` parameter has moved to `output_config.format`, and beta headers are no longer required. The old beta header (`structured-outputs-2025
**Migrating from beta?** The `output_format` parameter has moved to `output_config.format`, and beta headers are no longer required. The API continues to accept the old beta head
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build-with-claude/skills-guide
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// The PHP SDK supports container skills only through $client->beta->messages with the skills beta.
$message = $client->beta->messages->create(
$message = $client->messages->create(
betas: ['code-execution-2025-08-25', 'skills-2025-10-02'],
'skill_id' => 'pptx',
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Default routing never draws the up-front [oversized-image rejection](https://platform.claude.com/docs/en/build-with-claude/vision-coordinates#oversized-image-error) for models you
Named fallback models count toward the [oversized-image check](https://platform.claude.com/docs/en/build-with-claude/vision-coordinates#oversized-image-error): a request whose imag
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build-with-claude/prompt-caching
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build-with-claude/prompt-caching
On Claude Fable 5, [Claude Mythos 5](https://anthropic.com/glasswing), Claude Opus 4.8, Claude Opus 5, and Claude Sonnet 5, you can add a new system instruction partway through a
On Claude Fable 5, [Claude Mythos 5](https://anthropic.com/glasswing), Claude Opus 4.8, and Claude Opus 5, you can add a new system instruction partway through a conversation wit
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build-with-claude/pdf-support
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build-with-claude/pdf-support
import httpx
import httpx2
httpx.get(pdf_url, follow_redirects=True).content
httpx2.get(pdf_url, follow_redirects=True).content
// The PHP SDK exposes the Files API under the beta namespace; field names can differ from other SDKs.
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build-with-claude/overview
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Features on the Claude Platform are assigned one of the following availability classifications per platform (shown in the Availability column of each following table). Not all feat
The Availability column in each of the following tables lists the platforms that offer a feature. A platform listed without a label offers the feature as stable, fully supported, a
| Classification | Description
| ---------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------
| **Beta** | Preview features used for gathering feedback and iterating on a less mature use case. Availability may be limited, including through sign-up requir
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build-with-claude/mid-conversation-system-messages
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build-with-claude/mid-conversation-system-messages
This page covers two features: mid-conversation system messages, which are generally available, and [mid-conversation tool changes](https://platform.claude.com/docs/en/build-with-c
This page covers two features: mid-conversation system messages, and [mid-conversation tool changes](https://platform.claude.com/docs/en/build-with-claude/mid-conversation-system-m
This feature is available on Claude Fable 5, [Claude Mythos 5](https://anthropic.com/glasswing), Claude Opus 4.8, Claude Opus 5, and Claude Sonnet 5. No beta header is required f
This feature is available on Claude Fable 5, [Claude Mythos 5](https://anthropic.com/glasswing), Claude Opus 4.8, and Claude Opus 5. No beta header is required for mid-conversati
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build-with-claude/handling-stop-reasons
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RESPONSE=$(ant messages create --max-tokens 1024 \
--format jsonl < request.yaml)
RESPONSE=$(ant messages create --max-tokens 1024 --format jsonl < request.yaml)
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build-with-claude/files
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build-with-claude/files
// The PHP SDK exposes the Files API under the beta namespace; field names can differ from other SDKs.
$file = $client->beta->files->upload(
FileParam::fromResource(fopen('/path/to/document.pdf', 'rb'), contentType: 'application/pdf'),
$file = $client->files->upload(
file: FileParam::fromResource(fopen('/path/to/document.pdf', 'rb'), contentType: 'application/pdf'),
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build-with-claude/fast-mode
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build-with-claude/fast-mode
Fast mode for Claude Opus 5 and Claude Opus 4.8 is available as a research preview on the Claude API, including [Claude Managed Agents](https://platform.claude.com/docs/en/manage
Fast mode for Claude Opus 5 and Claude Opus 4.8 is available as a research preview on the Claude API, including [Claude Managed Agents](https://platform.claude.com/docs/en/manage
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build-with-claude/embeddings
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build-with-claude/embeddings
>
> * When `input_type="document"`, a query like "Apple's conference call to discuss fourth fiscal quarter results and business updates is scheduled for Thursday, November 2, 2
> * When `input_type="document"`, a query like "Apple's conference call to discuss fourth fiscal quarter results and business updates is scheduled for Thursday, November 2, 2
+1 −2 lines
Recorded here 21 Aug 2026 20:07 UTC
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