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AI release notes

Anthropic's official release notes. Claude apps: the website, desktop and phone apps. Claude Code: Claude's coding assistant. Claude API: what developers use to build Claude into their own products.

Compiled by the Toolstash team · Updated

  1. Claude Code

    Claude Code 2.1.31

    2 new5 fixes4 other

    Added session resume hint on exit, showing how to continue your conversation later. Added support for full-width (zenkaku) space input from Japanese IME in checkbox selection.

  2. Claude Code

    Claude Code 2.1.30

    7 new9 fixes3 other

    Added pages parameter to the Read tool for PDFs, allowing specific page ranges to be read (e.g., pages: "1-5"). Large PDFs (>10 pages) now return a lightweight reference when @ mentioned instead of being inlined into context. Added pre-configured OAuth client credentials for MCP servers that don't support Dynamic Client Registration (e.g., Slack). Use --client-id and --client-secret with claude mcp add.

  3. Claude Code

    Claude Code 2.1.29

    1 fix

    Fixed startup performance issues when resuming sessions that have saved_hook_context.

  4. Claude Code

    Claude Code 2.1.27

    2 new6 fixes3 other

    Added tool call failures and denials to debug logs. Added --from-pr flag to resume sessions linked to a specific GitHub PR number or URL.

  5. Claude Code

    Claude Code 2.1.25

    1 fix

    Fixed beta header validation error for gateway users on Bedrock and Vertex, ensuring CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS=1 avoids the error.

  6. Claude Code

    Claude Code 2.1.23

    1 new7 fixes3 other

    Added customizable spinner verbs setting (spinnerVerbs).

  7. Claude API

    Structured outputs are out of beta on the Claude API for Claude Sonnet 4.5, Claude Opus 4.5, and Claude…

    This release includes expanded schema support, improved grammar compilation latency, and a simplified integration path with no beta header required. The output_format parameter has moved to output_config.format. Existing beta users can continue using the beta header during the transition period. Structured outputs remain in beta on Amazon Bedrock and Microsoft Foundry.

  8. Claude Code

    Claude Code 2.1.22

    1 fix

    Fixed structured outputs for non-interactive (-p) mode.

  9. Claude Code

    Claude Code 2.1.21

    2 new6 fixes2 other

    Added support for full-width (zenkaku) number input from Japanese IME in option selection prompts. [VSCode] Added automatic Python virtual environment activation, ensuring python and pip commands use the correct interpreter (configurable via claudeCode.usePythonEnvironment setting).

  10. Claude Code

    Claude Code 2.1.20

    5 new12 fixes12 other

    Added arrow key history navigation in vim normal mode when cursor cannot move further. Added external editor shortcut (Ctrl+G) to the help menu for better discoverability.

  11. Claude Code

    Claude Code 2.1.19

    3 new8 fixes3 other

    Added env var CLAUDE_CODE_ENABLE_TASKS, set to false to keep the old system temporarily. Added shorthand $0, $1, etc. for accessing individual arguments in custom commands.

  12. Claude Code

    Claude Code 2.1.17

    1 fix

    Fixed crashes on processors without AVX instruction support.

  13. Claude Code

    Claude Code 2.1.16

    3 new4 fixes

    Added new task management system, including new capabilities like dependency tracking. [VSCode] Added native plugin management support.

  14. Claude Code

    Claude Code 2.1.15

    1 new2 fixes1 other

    Added deprecation notification for npm installations - run claude install or see https://docs.anthropic.com/en/docs/claude-code/getting-started for more options.

  15. Claude Code

    Claude Code 2.1.14

    4 new11 fixes1 other

    Added history-based autocomplete in bash mode (!) - type a partial command and press Tab to complete from your bash command history. Added search to installed plugins list - type to filter by name or description.

  16. Claude Code

    Claude Code 2.1.12

    1 fix

    Fixed message rendering bug.

  17. Claude Code

    Claude Code 2.1.11

    1 fix

    Fixed excessive MCP connection requests for HTTP/SSE transports.

  18. Claude Code

    Claude Code 2.1.9

    6 new3 fixes

    Added auto:N syntax for configuring the MCP tool search auto-enable threshold, where N is the context window percentage (0-100). Added plansDirectory setting to customize where plan files are stored.

  19. Claude apps

    Cowork research preview expanded to Pro plans, plus 2 more changes

    Cowork is now available to Pro plan users on Claude Desktop (macOS only). We’re now including Claude Code access with every Team plan standard seat. Refer to this article for more information: Purchasing and managing seats on Team plans.

  20. Claude Code

    Claude Code 2.1.7

    3 new9 fixes3 other

    Added showTurnDuration setting to hide turn duration messages (e.g., "Cooked for 1m 6s"). Added ability to provide feedback when accepting permission prompts.

  21. Claude Code

    Claude Code 2.1.6

    6 new12 fixes7 other

    Added search functionality to /config command for quickly filtering settings. Added Updates section to /doctor showing auto-update channel and available npm versions (stable/latest).

  22. Claude Code

    Claude Code 2.1.5

    1 new

    Added CLAUDE_CODE_TMPDIR environment variable to override the temp directory used for internal temp files, useful for environments with custom temp directory requirements.

  23. Claude API

    console.anthropic.com now redirects to platform.claude.com

    The Claude Console has moved to its new home as part of our Claude brand consolidation. Existing bookmarks and links will continue working through an automatic redirect.

  24. Claude apps

    Cowork research preview on Claude Desktop (macOS only) for Max plans, plus 4 more changes

    Cowork brings Claude Code's agentic capabilities to the Claude desktop app for knowledge work beyond coding. It runs locally on your computer in an isolated VM, enabling direct access to local files and MCP integrations. Refer to this article to learn more: Getting started with Cowork.

  25. Claude Code

    Claude Code 2.1.4

    1 new1 fix

    Added CLAUDE_CODE_DISABLE_BACKGROUND_TASKS environment variable to disable all background task functionality including auto-backgrounding and the Ctrl+B shortcut.

  26. Claude Code

    Claude Code 2.1.3

    3 new6 fixes4 other

    Added release channel (stable or latest) toggle to /config. Added detection and warnings for unreachable permission rules, with warnings in /doctor and after saving rules that include the source of each rule and actionable fix guidance.

  27. Claude Code

    Claude Code 2.1.2

    6 new8 fixes8 other

    Added source path metadata to images dragged onto the terminal, helping Claude understand where images originated. Added clickable hyperlinks for file paths in tool output in terminals that support OSC 8 (like iTerm).

  28. Claude Code

    Claude Code 2.1.1

  29. Claude Code

    Claude Code 2.0.76

    1 fix

    Fixed issue with macOS code-sign warning when using Claude in Chrome integration.

  30. Claude API

    We’ve retired the Claude Opus 3 model

    All requests to this model will now return an error. We recommend upgrading to Claude Opus 4.5, which offers significantly improved intelligence at a third of the cost. Researchers can request ongoing access to Claude Opus 3 on the API through the External Researcher Access Program.