599 pages for tail.

Documents Claude Developer Platform · in the page api/compliance/apps/projects/documents …**GET** `/v1/compliance/apps/projects/documents/{document_id}` Get detailed information for a specific project document. ### Path parameters - `document_id: string` The document ID (tagged ID, e… Get project document content Claude Developer Platform · in the page api/compliance/apps/projects/documents/retrieve …**GET** `/v1/compliance/apps/projects/documents/{document_id}` Get detailed information for a specific project document. ## Path parameters - `document_id: string` The document ID (tagged ID, e.… errors Claude Developer Platform · in the page api/errors …issue with your billing or payment information. Check your payment details in the [Claude Console](https://platform.claude.com), or in AWS Marketplace if you're using Claude Platform on AWS. * 403 -… Messages Claude Developer Platform · in the page api/messages …tps://platform.claude.com/docs/en/about-claude/models/overview) for details. minimum: 0 - `messages: array of MessageParam` Input messages. Our models are trained to operate on alternating `… Batches Claude Developer Platform · in the page api/messages/batches …tps://platform.claude.com/docs/en/about-claude/models/overview) for details. minimum: 0 - `messages: array of MessageParam` Input messages. Our models are trained to operate… Create a Message Batch Claude Developer Platform · in the page api/messages/batches/create …tps://platform.claude.com/docs/en/about-claude/models/overview) for details. minimum: 0 - `messages: array of MessageParam` Input messages. Our models are trained to operate… Retrieve Message Batch results Claude Developer Platform · in the page api/messages/batches/results …latform.claude.com/docs/en/build-with-claude/extended-thinking) for details. - `thinking: string` The text of Claude's thinking process for this block. - `Redact… Count tokens in a Message Claude Developer Platform · in the page api/messages/count_tokens …//platform.claude.com/docs/en/build-with-claude/prompt-caching) for details. - `"5m"` - `"1h"` - `citations: optional array of TextCitationParam or null`… Create a Message Claude Developer Platform · in the page api/messages/create …tps://platform.claude.com/docs/en/about-claude/models/overview) for details. minimum: 0 - `messages: array of MessageParam` Input messages. Our models are trained to operate on alternating `… Models Claude Developer Platform · in the page api/models …ties or null` Object mapping capability names to their support details. Keys are always present for all known capabilities. - `batch: CapabilitySupport` Whether the model supports the… List Models Claude Developer Platform · in the page api/models/list …ties or null` Object mapping capability names to their support details. Keys are always present for all known capabilities. - `batch: CapabilitySupport` Whether the model supports the… Get a Model Claude Developer Platform · in the page api/models/retrieve …ties or null` Object mapping capability names to their support details. Keys are always present for all known capabilities. - `batch: CapabilitySupport` Whether the model supports the… overview Claude Developer Platform · in the page api/overview …/docs/en/api/models/list)**: List available Claude models and their details (`GET /v1/models`) * **[Files API](https://platform.claude.com/docs/en/api/files/upload)**: Upload and manage files for use… rate-limits Claude Developer Platform · in the page api/rate-limits …-claude/fast-mode) are not available on Claude Platform on AWS. For details, see [Rate limits and quotas on Claude Platform on AWS](https://platform.claude.com/docs/en/build-with-claude/claude-platfor… service-tiers Claude Developer Platform · in the page api/service-tiers …view](https://platform.claude.com/docs/en/models/overview) for more details on available models. citations Claude Developer Platform · in the page build-with-claude/citations …Google Cloud: ga Microsoft Foundry: ga --- Claude can provide detailed citations when answering questions about documents, helping you track and verify the sources behind each response. All [ac… claude-in-amazon-bedrock Claude Developer Platform · in the page build-with-claude/claude-in-amazon-bedrock …Data handling for this offering is governed by Amazon Bedrock. For details, see [Data protection in Amazon Bedrock](https://docs.aws.amazon.com/bedrock/latest/userguide/data-protection.html). ## Mon… claude-in-microsoft-foundry Claude Developer Platform · in the page build-with-claude/claude-in-microsoft-foundry …cs/en/about-claude/pricing#claude-in-microsoft-foundry-pricing) for details. ## Hosting options Claude models in Microsoft Foundry are available in two hosting options. You choose the hosting option… claude-on-amazon-bedrock-legacy Claude Developer Platform · in the page build-with-claude/claude-on-amazon-bedrock-legacy …//platform.claude.com/docs/en/cli-sdks-libraries/overview) for more details, and the [official Bedrock documentation](https://docs.aws.amazon.com/bedrock/). ### Bearer token authentication You can a… claude-on-vertex-ai Claude Developer Platform · in the page build-with-claude/claude-on-vertex-ai …nt Platform docs](https://cloud.google.com/vertex-ai/docs) for more details. Claude is also available through [Amazon Bedrock](https://platform.claude.com/docs/en/build-with-claude/claude-in-amazon-b… claude-platform-on-aws Claude Developer Platform · in the page build-with-claude/claude-platform-on-aws …latform.claude.com/docs/en/about-claude/pricing#private-offers) for details. <Note> When you use Claude Platform on AWS, Anthropic processes and stores your content (such as prompts and out… sent_count = len(messages sent in the compaction request) Claude Developer Platform · in the page build-with-claude/compaction …step, which contributes to rate limits and billing. The API returns detailed usage information in the response: ```json Output { "usage": { "input_tokens": 23000, "output_tokens": 1000,… compaction-keep-recent-turns Claude Developer Platform · in the page build-with-claude/compaction-keep-recent-turns …vailable Google Cloud: beta Microsoft Foundry: beta --- Keep-tail compaction keeps the last few turns of a conversation word for word after the summary. It changes two things in the [compacti… compaction-on-demand Claude Developer Platform · in the page build-with-claude/compaction-on-demand …same safeguards as your other requests. After a `"refusal"`, [`stop_details`](https://platform.claude.com/docs/en/build-with-claude/handling-stop-reasons#refusal) identifies the policy category behind… compaction-threshold Claude Developer Platform · in the page build-with-claude/compaction-threshold …step, which contributes to rate limits and billing. The API returns detailed usage information in the response: ```json Output { "usage": { "input_tokens": 23000, "output_tokens": 1000,… context-editing Claude Developer Platform · in the page build-with-claude/context-editing …rder. 5. **Context to Preserve:** User preferences, domain-specific details, and commitments made. This structure enables Claude to resume work efficiently without losing important context or repeati… context-windows Claude Developer Platform · in the page build-with-claude/context-windows …orm.claude.com/docs/en/build-with-claude/handling-stop-reasons) for details. To stay within context window limits, use the [token counting API](https://platform.claude.com/docs/en/build-with-claude/t… effort Claude Developer Platform · in the page build-with-claude/effort …ntic work, and for exploratory tasks such as repeated tool calling, detailed web search, and knowledge-base search. Expect meaningfully higher token usage than `high`. | | `max` | Reserve for front… This will automatically use the environment variable VOYAGE_API_KEY. Claude Developer Platform · in the page build-with-claude/embeddings …ge 4 blog post](https://blog.voyageai.com/2026/01/15/voyage-4/) for details. | | `voyage-4` | 32,000 | 1024 (default), 256, 512, 2048 | Optimized fo… extended-thinking Claude Developer Platform · in the page build-with-claude/extended-thinking …what a budget actually costs you, monitor the `usage.output_tokens_details.thinking_tokens` field in the response, which reports how many of the billed output tokens were internal reasoning. When str… fallback-credit Claude Developer Platform · in the page build-with-claude/fallback-credit …p title="Read two fields from the refusal"> On a refusal, `stop_details` includes two fields: * **`fallback_credit_token`:** an opaque string that represents the credit. * **`fallback_has… fast-mode Claude Developer Platform · in the page build-with-claude/fast-mode …multipliers apply on top of fast mode pricing For complete pricing details, see the [Pricing](https://platform.claude.com/docs/en/about-claude/pricing#fast-mode-pricing) page. ## Rate limits Fast m… handling-stop-reasons Claude Developer Platform · in the page build-with-claude/handling-stop-reasons …| Claude declined to respond. | Read `stop_details` and [retry on a fallback model](https://platform.claude.com/docs/en/build-with-claude/refusals-and-fallback).… mid-conversation-system-messages Claude Developer Platform · in the page build-with-claude/mid-conversation-system-messages …ared in `tools` returns a 400 error (on the Claude API, with `error.details.error_code` set to `tool_reference_unresolved`). A `tool_addition` block can instead [carry the tool's full definition](http… overview Claude Developer Platform · in the page build-with-claude/overview …s responses in source documents. With Citations, Claude can provide detailed references to the exact sentences and passages it uses to generate responses, leading to more verifiable, trustworthy outpu… preserved-thinking Claude Developer Platform · in the page build-with-claude/preserved-thinking …with this scheme and for most workloads it performs well. #### Keep-tail compaction Keep-tail compaction summarizes the older turns and keeps the most recent turns verbatim, so the model still sees… Request 2 caches its request content (not the response) Claude Developer Platform · in the page build-with-claude/prompt-caching …(https://platform.claude.com/docs/en/about-claude/pricing) for full details. </Note> *** ## Supported models Prompt caching (both automatic and explicit) is supported on all [active Claude models](… claude-prompting-best-practices Claude Developer Platform · in the page build-with-claude/prompt-engineering/claude-prompting-best-practices …models/fable-5/introducing-claude-fable-5-and-claude-mythos-5). For details on what's new in Claude Sonnet 5, see [What's new in Claude Sonnet 5](https://platform.claude.com/docs/en/models/sonnet-5/wh… prompting-claude-fable-5 Claude Developer Platform · in the page build-with-claude/prompt-engineering/prompting-claude-fable-5 …de Fable 5 interprets dense technical images, web applications, and detailed screenshots with substantially higher accuracy, often while using fewer output tokens, and is trained to use bash and crop… Delivering work Claude Developer Platform · in the page build-with-claude/prompt-engineering/prompting-claude-fable-5-1 …ent-side compaction summaries drop constraints, decisions, or exact details: [Tell the model what to preserve in compaction summaries](https://platform.claude.com/docs/en/build-with-claude/prompt-engi… prompting-claude-opus-4-8 Claude Developer Platform · in the page build-with-claude/prompt-engineering/prompting-claude-opus-4-8 …: ```text wrap Before building, propose 4 distinct visual directions tailored to this brief (each as: bg hex / accent hex / typeface — one-line rationale). Ask the user to pick one, then implement on… prompting-claude-opus-5 Claude Developer Platform · in the page build-with-claude/prompt-engineering/prompting-claude-opus-5 …ould answer "what happened" or "what did you find," with supporting detail after it for readers who want it. ``` To tune narration up, or change its style, the same lever applies in the other directi… prompting-claude-opus-5-5 Claude Developer Platform · in the page build-with-claude/prompt-engineering/prompting-claude-opus-5-5 …ssages) * Answers about dense charts, diagrams, or screenshots miss detail: [Tools for complex visual inputs](https://platform.claude.com/docs/en/build-with-claude/prompt-engineering/prompting-claude-… prompting-claude-sonnet-5 Claude Developer Platform · in the page build-with-claude/prompt-engineering/prompting-claude-sonnet-5 …: ```text wrap Before building, propose 4 distinct visual directions tailored to this brief (each as: bg hex / accent hex / typeface, plus a one-line rationale). Ask the user to pick one, then implem… refusals-and-fallback Claude Developer Platform · in the page build-with-claude/refusals-and-fallback …al response, not an error, with `stop_reason: "refusal"`. Its `stop_details.category` names the policy area (see [What a refusal looks like](https://platform.claude.com/docs/en/build-with-claude/refus… skills-guide Claude Developer Platform · in the page build-with-claude/skills-guide …e successfully. </Card> </CardGroup> ## Overview <Note> For a detailed look at the architecture and real-world applications of Agent Skills, read the engineering blog post: [Equipping agents for… streaming Claude Developer Platform · in the page build-with-claude/streaming …both sync and async streams. See the documentation in each SDK for details. <CodeGroup exclude="shell:cURL"> ```bash CLI ant messages create --stream --format jsonl \ --model claude-opus-5-5… structured-outputs Claude Developer Platform · in the page build-with-claude/structured-outputs …g with structured outputs easier. See individual SDK pages for full details. <Tabs> <Tab title="CLI"> **Raw JSON schemas through heredoc body** The CLI passes raw JSON schemas as a YAML he… thinking Claude Developer Platform · in the page build-with-claude/thinking …e/thinking#controlling-thinking-display) for per-model defaults and details. If Claude uses tools, thinking can also appear between tool calls. See [Thinking with tool use](https://platform.claude.co… thinking-steering-and-cost Claude Developer Platform · in the page build-with-claude/thinking-steering-and-cost …tokens were spent on internal reasoning, read `usage.output_tokens_details.thinking_tokens` in the response. This value reflects the raw reasoning the model generated (not the summarized text returne…