348 pages for opus.
Titles and paths first, then pages whose text carries it. Each row opens that page as this site last read it.
Deploy managed settings
Claude Code CLI · in the page
managed-settings
…ombines them by these rules: * **Single values**, such as `"model": "opus"` or `"cleanupPeriodDays": 7`: the later file's value replaces the earlier one * **Lists**, such as `permissions.deny` or `sa…
Connect Claude Code to tools via MCP
Claude Code CLI · in the page
mcp
…ch include `ENABLE_TOOL_SEARCH=false` and a model earlier than Claude Opus 4.5, Claude Sonnet 4.5, and Claude Haiku 4.5 on Google Cloud's Agent Platform. For an `ANTHROPIC_BASE_URL` gateway, see [Tool…
Claude Code on Microsoft Foundry
Claude Code CLI · in the page
microsoft-foundry
…you'll set these names as the model variables in step 4: * Claude Opus * Claude Sonnet * Claude Haiku When you configure a deployment, you also choose its [hosting option](https://platfo…
Model configuration
Claude Code CLI · in the page
model-config
…lution) where Fable is available to you, otherwise the same model as `opus` | | **`fable`** | Uses the [Fable model for your provider](#fable-alias-resolution) for your hardest and longest-running tas…
Choose a permission mode
Claude Code CLI · in the page
permission-modes
…and [Claude Platform on AWS](/docs/en/claude-platform-on-aws), Claude Opus 4.6 or later, Sonnet 4.6 or later, Haiku 5.5, or a [Fable model](/docs/en/model-config#work-with-fable). On Amazon Bedrock, G…
Configure permissions
Claude Code CLI · in the page
permissions
…eter the tool accepts: | Rule | Matches | | :- | :- | | `Agent(model:opus)` | Agent calls that request the Opus model tier | | `Agent(isolation:worktree)` | Agent calls that request a git worktree |…
How Claude Code uses prompt caching
Claude Code CLI · in the page
prompt-caching
…che, so changing effort mid-session recomputes the entire request. On Opus 5.5, Sonnet 5.5, Haiku 5.5, and Fable 5.1 with an API key or a Claude subscription, the cache stays intact by default. See [C…
Continue local sessions from any device with Remote Control
Claude Code CLI · in the page
remote-control
…, from v2.1.260: pass the model as an argument, for example `/advisor opus`, or pass `off` to turn the advisor off. Both forms apply to the current session only and leave your saved default unchanged.…
Catch security issues as Claude writes code
Claude Code CLI · in the page
security-guidance
…both subject to the caps above. Both model-backed reviews use Claude Opus 4.7 by default. Set `SECURITY_REVIEW_MODEL` to choose a different model for the end-of-turn review and `SG_AGENTIC_MODEL` for…
Customize sessions in self-hosted environments
Claude Code CLI · in the page
self-hosted-environments-configuration
…model-versions) do reach sessions. They decide what an alias such as `opus` resolves to, not what a full model ID resolves to. * **Models your account doesn't serve**: a session can fail on a message…
Claude Code settings
Claude Code CLI · in the page
settings
…visor tool](/docs/en/advisor). Accepts the model aliases `"fable"`, `"opus"`, and `"sonnet"`, or a full model ID. `"fable"` requires [Fable 5 access](/docs/en/advisor#choose-an-advisor-model). Written…
Example settings files
Claude Code CLI · in the page
settings-example
…xxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" ], "availableModels": [ "opus", "sonnet" ], "enforceAvailableModels": true, "permissions": { "deny": [ "Bash(curl *)", "Read(./.e…
All settings
Claude Code CLI · in the page
settings-reference
…y file`](#scopes) * **Type**: string, one of the aliases `"fable"`, `"opus"`, or `"sonnet"`, which resolve to Claude Code's current default version of that model family, or a full model ID such as `"c…
Customize your status line
Claude Code CLI · in the page
statusline
…ath": "/path/to/transcript.jsonl", > "model": { > "id": "claude-opus-5-5", > "display_name": "Opus" > }, > "workspace": { > "current_dir": "/current/working/directory", > "projec…
Create custom subagents
Claude Code CLI · in the page
sub-agents
…lm-gateway) reached through `ANTHROPIC_BASE_URL`, Explore runs on the Opus model that the [`opus` alias](/docs/en/model-config#model-aliases) resolves to. * On Amazon Bedrock, Google Cloud's Agent P…
Enterprise deployment overview
Claude Code CLI · in the page
third-party-integrations
…el versions using `ANTHROPIC_DEFAULT_FABLE_MODEL`, `ANTHROPIC_DEFAULT_OPUS_MODEL`, `ANTHROPIC_DEFAULT_SONNET_MODEL`, and `ANTHROPIC_DEFAULT_HAIKU_MODEL`. Without pinning, model aliases resolve to Clau…
Tools reference
Claude Code CLI · in the page
tools-reference
…rt with a [`PARTIAL view` notice](#large-files) doesn't count. Claude Opus 4.6, Claude Haiku 4.5, and older models always require the read. Newer models can edit an unread file when reading it wouldn'…
Week 16 · April 13–17, 2026
Claude Code CLI · in the page
whats-new/2026-w16
# Week 16 · April 13–17, 2026 > Claude Opus 4.7 with the new xhigh effort level, Routines on Claude Code on the web, mobile push notifications that ping your phone when Claude needs you, a /usage bre…
Week 17 · April 20–24, 2026
Claude Code CLI · in the page
whats-new/2026-w17
…s/en/model-config#adjust-effort-level) for Pro and Max subscribers on Opus 4.6 and Sonnet 4.6 is now `high` (was `medium`)Native macOS and Linux builds replace the `Glob` and `Grep` tools with embedde…
Week 20 · May 11–15, 2026
Claude Code CLI · in the page
whats-new/2026-w20
…e working toward a goal until a condition holds, and run fast mode on Opus 4.7 by default. Releases [v2.1.139 → v2.1.142](/docs/en/changelog#2-1-139) 3 features · May 11–15 Agent view research previ…
Week 21 · May 18–22, 2026
Claude Code CLI · in the page
whats-new/2026-w21
…de is now available on the Pro plan and supports Sonnet 4.6 alongside Opus. It replaces permission prompts with background safety checks: routine actions run without interrupting you, and destructive…
Week 22 · May 25–29, 2026
Claude Code CLI · in the page
whats-new/2026-w22
# Week 22 · May 25–29, 2026 > Run Claude Code on Claude Opus 4.8, orchestrate large tasks with dynamic workflows, catch security issues with the security-guidance plugin, and use fast mode on Opus 4.…
Week 23 · June 1–5, 2026
Claude Code CLI · in the page
whats-new/2026-w23
…zon Bedrock, Google Cloud's Agent Platform, and Microsoft Foundry for Opus 4.7 and Opus 4.8, replacing permission prompts with background safety checks on third-party providers. Opt in by setting `CLA…
Week 25 · June 15–19, 2026
Claude Code CLI · in the page
whats-new/2026-w25
…meters with the `Tool(param:value)` syntax. For example, `Agent(model:opus)` matches subagent spawns that request the Opus model tier. The value accepts `*` as a wildcard, so `Agent(isolation:*)` matc…
Week 27 · June 29 – July 3, 2026
Claude Code CLI · in the page
whats-new/2026-w27
…ilt-in Explore agent now inherits the main session's model (capped at Opus) instead of running on HaikuBackground agents launched from `claude agents` now commit, push, and open a draft PR when they f…
Week 28 · July 6–10, 2026
Claude Code CLI · in the page
whats-new/2026-w28
…rovals from being acted onImproved `/code-review` findings quality on Opus 4.8 across all effort levels [Full changelog for v2.1.202–v2.1.206 →](/docs/en/changelog#2-1-202)
Week 29 · July 13–17, 2026
Claude Code CLI · in the page
whats-new/2026-w29
…ud's Agent Platform, and Claude Platform on AWS now default to Claude Opus 4.8The collapsed tool summary line shows a live elapsed-time counter, so long-running tool calls visibly tick instead of look…
Week 30 · July 20–24, 2026
Claude Code CLI · in the page
whats-new/2026-w30
# Week 30 · July 20–24, 2026 > Opus 5 becomes the default Opus model, Claude Code Desktop adds an iOS Simulator pane, and the Claude Security plugin scans your code for vulnerabilities. Releases [v2…
Week 33 · August 10–14, 2026
Claude Code CLI · in the page
whats-new/2026-w33
…skCreate`, `TaskUpdate`, and `TodoWrite`, are [no longer available on Opus 4.8, Sonnet 5, Fable 5, Mythos 5, and later models in those families](/docs/en/tools-reference#task-tool-availability); set `…
Week 36 · August 31 – September 4, 2026
Claude Code CLI · in the page
whats-new/2026-w36
…r pass `--permission-mode`Seat-based Enterprise plans now [default to Opus 5](/docs/en/model-config#default-model-setting)In the VS Code extension, click the model name at the bottom of the prompt box…
What's new
Claude Code CLI · in the page
whats-new/index
…Week 32 digest →](/docs/en/whats-new/2026-w32) **Week 30** **Claude Opus 5**: the new default Opus model in Claude Code, with a 1M-token context window and fast mode at \$10/\$50 per MTok. Also thi…
Zero data retention
Claude Code CLI · in the page
zero-data-retention
…resolves to the latest Fable model where it is available, resolves to Opus for organizations where it is not. ## Data retention for policy violations Even with ZDR enabled, Anthropic may retain data…
Claude Science changelog
Claude Documentation · in the page
claude-science/changelog
…with a one-click switch to an alternative model * Sessions on Claude Opus 5 now stay focused on what you asked for, with fewer unrequested analyses, figures, and sub-agents * On macOS behind a TLS-in…
Customize Claude Tag
Claude Documentation · in the page
claude-tag/admins/customize
…ccess**. The options are the models your organization allows, such as Opus and Sonnet models, regardless of any individual member's own model access. The picker also lists model families. A scope set…
Troubleshoot Claude Tag setup
Claude Documentation · in the page
claude-tag/admins/troubleshooting
…tors#admin-controls-for-personal-connectors) in channels, turn Claude Opus 5 on there too. Sessions and routines keep running on the models you chose for them, and auto mode allow rules you already ad…
Personal connectors in channels
Claude Documentation · in the page
claude-tag/concepts/personal-connectors
…ocs/connectors/getting-started). On the Enterprise plan, keep Claude Opus 5 turned on under **Model access** on your organization's [**Models**](https://claude.ai/admin-settings/models) page, which a…
Commands Claude Tag understands
Claude Documentation · in the page
claude-tag/users/commands
…fter `!fast` makes the message an ordinary prompt. Fast mode runs on Opus models, so `!fast` can change the session's model as well as its speed. The footer of each Claude reply names the model the s…
Choose the model Claude Tag uses
Claude Documentation · in the page
claude-tag/users/models
…s, in the thread. ```text wrap theme={null} @Claude switch to Claude Opus 5.5 for the rest of this thread. ``` To confirm the switch, check the reply footers. The reply that acknowledges the switch…
Troubleshoot Claude Tag in channels and DMs
Claude Documentation · in the page
claude-tag/users/troubleshooting
…d with and don't pick up the change. ### Claude says it needs Claude Opus 5 to use my personal connectors **What you see** You ask Claude in a channel to do something that needs one of your [person…
Changelog
Claude Documentation · in the page
cowork/changelog
…ad and turns spellcheck off. * Changed the default context window for Opus 4.7 and later, Sonnet 5 and later, and Fable 5 and later to 1M tokens behind a gateway or custom base URL; previously 200K un…
Use Claude for Outlook
Claude Documentation · in the page
office-agents/outlook
…When you sign in with a Claude account, you can choose between Claude Opus 4.7, Opus 4.6, and Sonnet 4.6. When you connect through a third-party platform such as Vertex AI, Azure AI Foundry, or an LLM…
Use Claude for M365 with third-party platforms
Claude Documentation · in the page
office-agents/third-party-platforms
…ed. Deployment names must use default model IDs (for example, `claude-opus-4-6`), not custom names. Then one credential path: **keyless**, your own Entra app registration with the Azure Cognitive Serv…
Deploy with a bootstrap server
Claude Documentation · in the page
third-party/claude-desktop/bootstrap
…e-sonnet-5"] }, power: { ...BASE, inferenceModels: ["claude-opus-5", "claude-sonnet-5"], coworkEgressAllowedHosts: ["pypi.org", "registry.npmjs.org"], }, }; const ENTITLED_ROLES = new…
Configuration reference
Claude Documentation · in the page
third-party/claude-desktop/configuration
…N) | JSON array **encoded as a string** | `["claude-sonnet-5","claude-opus-5"]` | | object (JSON) | JSON object mapping name to value, as a string | `{"X-Org-Id":"team1"}` | | object\[] (JSON) | JSON…
Deploy Claude Desktop on 3P with an LLM gateway
Claude Documentation · in the page
third-party/claude-desktop/gateway
…el IDs your gateway expects (for example `bedrock/us.anthropic.claude-opus-5` for a LiteLLM-style routing prefix). Your gateway can mark which Claude tier a model serves by returning an `anthropic_fa…
Models and effort levels
Claude Documentation · in the page
third-party/claude-desktop/models
…model with a native 1M context window**, such as `us.anthropic.claude-opus-5`: you don't need `supports1m` or `prefer1m`. Setting them doesn't change the assumed window. For earlier Claude Desktop ver…
Build an MCP client
Model Context Protocol · in the page
docs/2026-07-28/develop/build-client
…oad_dotenv() # load environment variables from .env MODEL = "claude-opus-5" anthropic = Anthropic() ``` `Client` is the single object your program talks to the server through. Listing the tools, ca…
Build an MCP client
Model Context Protocol · in the page
docs/draft/develop/build-client
…oad_dotenv() # load environment variables from .env MODEL = "claude-opus-5" anthropic = Anthropic() ``` `Client` is the single object your program talks to the server through. Listing the tools, ca…