47 pages for /release-notes.

Or, for the model with the same capabilities and no access approval requirement: Claude Developer Platform · in the page about-claude/models/migration-guide …isons * Review [API release notes](https://platform.claude.com/docs/en/release-notes/api) for API updates * Contact support if you encounter any issues during migration beta-headers Claude Developer Platform · in the page api/beta-headers …features, see the [release notes](https://platform.claude.com/docs/en/release-notes/overview). For help with production issues, contact [support](https://support.claude.com/). ## Next steps <CardGr… home Claude Developer Platform · in the page home …on="star" title="What's new" href="https://platform.claude.com/docs/en/release-notes/overview"> Latest features and updates. </Card> <Card icon="terminal" title="Claude Code" href… overview Claude Developer Platform · in the page models/fable-5-1/overview …="System prompt" icon="text" href="https://platform.claude.com/docs/en/release-notes/system-prompts/claude-fable-5-1"> The system prompt Claude Fable 5.1 uses on claude.ai and the Claude apps. <… overview Claude Developer Platform · in the page models/fable-5/overview …="System prompt" icon="text" href="https://platform.claude.com/docs/en/release-notes/system-prompts/overview#claude-fable-5"> The system prompt Claude Fable 5 uses on claude.ai and the Claude apps… overview Claude Developer Platform · in the page models/haiku-4-5/overview …="System prompt" icon="text" href="https://platform.claude.com/docs/en/release-notes/system-prompts/overview#claude-haiku-4-5"> The system prompt Claude Haiku 4.5 uses on claude.ai and the Claude… overview Claude Developer Platform · in the page models/haiku-5-5/overview …="System prompt" icon="text" href="https://platform.claude.com/docs/en/release-notes/system-prompts/claude-haiku-5-5"> The system prompt Claude Haiku 5.5 uses on claude.ai and the Claude apps. <… overview Claude Developer Platform · in the page models/opus-4-5/overview …="System prompt" icon="text" href="https://platform.claude.com/docs/en/release-notes/system-prompts/overview#claude-opus-4-5"> The system prompt Claude Opus 4.5 uses on claude.ai and the Claude ap… overview Claude Developer Platform · in the page models/opus-4-6/overview …="System prompt" icon="text" href="https://platform.claude.com/docs/en/release-notes/system-prompts/overview#claude-opus-4-6"> The system prompt Claude Opus 4.6 uses on claude.ai and the Claude ap… overview Claude Developer Platform · in the page models/opus-4-7/overview …="System prompt" icon="text" href="https://platform.claude.com/docs/en/release-notes/system-prompts/overview#claude-opus-4-7"> The system prompt Claude Opus 4.7 uses on claude.ai and the Claude ap… overview Claude Developer Platform · in the page models/opus-4-8/overview …="System prompt" icon="text" href="https://platform.claude.com/docs/en/release-notes/system-prompts/overview#claude-opus-4-8"> The system prompt Claude Opus 4.8 uses on claude.ai and the Claude ap… overview Claude Developer Platform · in the page models/opus-5-5/overview …="System prompt" icon="text" href="https://platform.claude.com/docs/en/release-notes/system-prompts/claude-opus-5-5"> The system prompt Claude Opus 5.5 uses on claude.ai and the Claude apps. </C… overview Claude Developer Platform · in the page models/opus-5/overview …="System prompt" icon="text" href="https://platform.claude.com/docs/en/release-notes/system-prompts/overview#claude-opus-5"> The system prompt Claude Opus 5 uses on claude.ai and the Claude apps.… overview Claude Developer Platform · in the page models/sonnet-4-5/overview …="System prompt" icon="text" href="https://platform.claude.com/docs/en/release-notes/system-prompts/overview#claude-sonnet-4-5"> The system prompt Claude Sonnet 4.5 uses on claude.ai and the Claud… overview Claude Developer Platform · in the page models/sonnet-4-6/overview …="System prompt" icon="text" href="https://platform.claude.com/docs/en/release-notes/system-prompts/overview#claude-sonnet-4-6"> The system prompt Claude Sonnet 4.6 uses on claude.ai and the Claud… overview Claude Developer Platform · in the page models/sonnet-5-5/overview …="System prompt" icon="text" href="https://platform.claude.com/docs/en/release-notes/system-prompts/claude-sonnet-5-5"> The system prompt Claude Sonnet 5.5 uses on claude.ai and the Claude apps.… overview Claude Developer Platform · in the page models/sonnet-5/overview …="System prompt" icon="text" href="https://platform.claude.com/docs/en/release-notes/system-prompts/claude-sonnet-5"> The system prompt Claude Sonnet 5 uses on claude.ai and the Claude apps. </C… overview Claude Developer Platform · in the page release-notes/overview …Claude Platform release notes url: https://platform.claude.com/docs/en/release-notes/overview description: Updates to the Claude Platform, including the Claude API, client SDKs, and the Claude Console… claude-fable-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-fable-5 …Claude Fable 5 system prompts url: https://platform.claude.com/docs/en/release-notes/system-prompts/claude-fable-5 description: See updates to the core system prompt for Claude Fable 5 on [claude.ai](… claude-fable-5-1 Claude Developer Platform · in the page release-notes/system-prompts/claude-fable-5-1 …aude Fable 5.1 system prompts url: https://platform.claude.com/docs/en/release-notes/system-prompts/claude-fable-5-1 description: See updates to the core system prompt for Claude Fable 5.1 on [claude.… claude-haiku-3 Claude Developer Platform · in the page release-notes/system-prompts/claude-haiku-3 …Claude Haiku 3 system prompts url: https://platform.claude.com/docs/en/release-notes/system-prompts/claude-haiku-3 description: See updates to the core system prompt for Claude Haiku 3 on [claude.ai](… claude-haiku-3-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-haiku-3-5 …aude Haiku 3.5 system prompts url: https://platform.claude.com/docs/en/release-notes/system-prompts/claude-haiku-3-5 description: See updates to the core system prompt for Claude Haiku 3.5 on [claude.… claude-haiku-4-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-haiku-4-5 …aude Haiku 4.5 system prompts url: https://platform.claude.com/docs/en/release-notes/system-prompts/claude-haiku-4-5 description: See updates to the core system prompt for Claude Haiku 4.5 on [claude.… claude-haiku-5-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-haiku-5-5 …aude Haiku 5.5 system prompts url: https://platform.claude.com/docs/en/release-notes/system-prompts/claude-haiku-5-5 description: See updates to the core system prompt for Claude Haiku 5.5 on [claude.… claude-opus-3 Claude Developer Platform · in the page release-notes/system-prompts/claude-opus-3 …Claude Opus 3 system prompts url: https://platform.claude.com/docs/en/release-notes/system-prompts/claude-opus-3 description: See updates to the core system prompt for Claude Opus 3 on [claude.ai](ht… claude-opus-4 Claude Developer Platform · in the page release-notes/system-prompts/claude-opus-4 …Claude Opus 4 system prompts url: https://platform.claude.com/docs/en/release-notes/system-prompts/claude-opus-4 description: See updates to the core system prompt for Claude Opus 4 on [claude.ai](ht… claude-opus-4-1 Claude Developer Platform · in the page release-notes/system-prompts/claude-opus-4-1 …laude Opus 4.1 system prompts url: https://platform.claude.com/docs/en/release-notes/system-prompts/claude-opus-4-1 description: See updates to the core system prompt for Claude Opus 4.1 on [claude.ai… claude-opus-4-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-opus-4-5 …laude Opus 4.5 system prompts url: https://platform.claude.com/docs/en/release-notes/system-prompts/claude-opus-4-5 description: See updates to the core system prompt for Claude Opus 4.5 on [claude.ai… claude-opus-4-6 Claude Developer Platform · in the page release-notes/system-prompts/claude-opus-4-6 …laude Opus 4.6 system prompts url: https://platform.claude.com/docs/en/release-notes/system-prompts/claude-opus-4-6 description: See updates to the core system prompt for Claude Opus 4.6 on [claude.ai… claude-opus-4-7 Claude Developer Platform · in the page release-notes/system-prompts/claude-opus-4-7 …laude Opus 4.7 system prompts url: https://platform.claude.com/docs/en/release-notes/system-prompts/claude-opus-4-7 description: See updates to the core system prompt for Claude Opus 4.7 on [claude.ai… claude-opus-4-8 Claude Developer Platform · in the page release-notes/system-prompts/claude-opus-4-8 …laude Opus 4.8 system prompts url: https://platform.claude.com/docs/en/release-notes/system-prompts/claude-opus-4-8 description: See updates to the core system prompt for Claude Opus 4.8 on [claude.ai… claude-opus-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-opus-5 …Claude Opus 5 system prompts url: https://platform.claude.com/docs/en/release-notes/system-prompts/claude-opus-5 description: See updates to the core system prompt for Claude Opus 5 on [claude.ai](ht… claude-opus-5-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-opus-5-5 …laude Opus 5.5 system prompts url: https://platform.claude.com/docs/en/release-notes/system-prompts/claude-opus-5-5 description: See updates to the core system prompt for Claude Opus 5.5 on [claude.ai… claude-sonnet-3-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-sonnet-3-5 …ude Sonnet 3.5 system prompts url: https://platform.claude.com/docs/en/release-notes/system-prompts/claude-sonnet-3-5 description: See updates to the core system prompt for Claude Sonnet 3.5 on [claud… claude-sonnet-3-7 Claude Developer Platform · in the page release-notes/system-prompts/claude-sonnet-3-7 …ude Sonnet 3.7 system prompts url: https://platform.claude.com/docs/en/release-notes/system-prompts/claude-sonnet-3-7 description: See updates to the core system prompt for Claude Sonnet 3.7 on [claud… claude-sonnet-4 Claude Developer Platform · in the page release-notes/system-prompts/claude-sonnet-4 …laude Sonnet 4 system prompts url: https://platform.claude.com/docs/en/release-notes/system-prompts/claude-sonnet-4 description: See updates to the core system prompt for Claude Sonnet 4 on [claude.ai… claude-sonnet-4-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-sonnet-4-5 …ude Sonnet 4.5 system prompts url: https://platform.claude.com/docs/en/release-notes/system-prompts/claude-sonnet-4-5 description: See updates to the core system prompt for Claude Sonnet 4.5 on [claud… claude-sonnet-4-6 Claude Developer Platform · in the page release-notes/system-prompts/claude-sonnet-4-6 …ude Sonnet 4.6 system prompts url: https://platform.claude.com/docs/en/release-notes/system-prompts/claude-sonnet-4-6 description: See updates to the core system prompt for Claude Sonnet 4.6 on [claud… claude-sonnet-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-sonnet-5 …laude Sonnet 5 system prompts url: https://platform.claude.com/docs/en/release-notes/system-prompts/claude-sonnet-5 description: See updates to the core system prompt for Claude Sonnet 5 on [claude.ai… claude-sonnet-5-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-sonnet-5-5 …ude Sonnet 5.5 system prompts url: https://platform.claude.com/docs/en/release-notes/system-prompts/claude-sonnet-5-5 description: See updates to the core system prompt for Claude Sonnet 5.5 on [claud… overview Claude Developer Platform · in the page release-notes/system-prompts/overview --- title: System prompts url: https://platform.claude.com/docs/en/release-notes/system-prompts/overview description: See updates to the core system prompts on [claude.ai](https://claude.ai), the [Cla… TypeScript SDK V2 session API (removed) Claude Code CLI · in the page agent-sdk/typescript-v2-preview …. It uses [`await using`](https://www.typescriptlang.org/docs/handbook/release-notes/typescript-5-2.html#using-declarations-and-explicit-resource-management) (TypeScript 5.2+) to automatically close t… Claude Code changelog Claude Code CLI · in the page changelog …d lists in `/help`, `/hooks`, `/copy`, `/chrome`, `/memory`, `/ide`, `/release-notes`, `/rewind`, `/diff`, `/remote-env`, `/plugin` and other pickers with page keys, mouse wheel and clicks * Improved… Explore the .claude directory Claude Code CLI · in the page claude-directory …e/changelog.md` | Cached copy of the Claude Code changelog, shown by `/release-notes`. Refreshed in the background. | | `policy-limits.json` | Cached feature policy settings for your organization. Onl… Commands Claude Code CLI · in the page commands …| | `/release-notes` | View the changelog i… Enterprise network configuration Claude Code CLI · in the page network-config …s/en/env-vars) | | `raw.githubusercontent.com` | Changelog feed for [`/release-notes`](/docs/en/commands). In interactive sessions, Claude Code also fetches it in the background at startup when its ca… Week 15 · April 6–10, 2026 Claude Code CLI · in the page whats-new/2026-w15 …ost` shows a per-model and cache-hit breakdown for subscription users`/release-notes` is now an interactive version pickerStatus line: new `refreshInterval` setting re-runs the command every N seconds…