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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 2.1.140

    10 fixes3 other

    Improved Agent tool subagent_type matching to accept case- and separator-insensitive values (e.g. "Code Reviewer" resolves to code-reviewer). Updated agent color palette.

  2. Claude API

    Fast mode now supports Claude Opus 4.7

    Set speed: "fast" with model: "claude-opus-4-7" and the fast-mode-2026-02-01 beta header for significantly faster output token generation at premium pricing. Pricing, rate limits, and access are the same as for Opus 4.6 fast mode; interested customers should join the waitlist.

  3. Claude Code

    Claude Code 2.1.139

    7 new32 fixes11 other

    Added agent view (Research Preview): a single list of every Claude Code session — running, blocked on you, or done. Run claude agents to get started. See https://code.claude.com/docs/en/agent-view. Added /goal command: set a completion condition and Claude keeps working across turns until it's met. Works in interactive, -p, and Remote Control. Shows live elapsed/turns/tokens as an overlay panel.

  4. New model

    New model: Claude Platform on AWS

    We’ve launched Claude Platform on AWS, bringing the Claude API to Anthropic-managed infrastructure accessible through AWS, with AWS billing and IAM authentication. Access the full Messages API, Files API, Message Batches API, Claude Managed Agents, Agent Skills, code execution, and tool use through native AWS endpoints. Learn more in Claude Platform on AWS.

  5. Claude Code

    Claude Code 2.1.138

    1 other

    Internal fixes.

  6. Claude Code

    Claude Code 2.1.137

    1 fix

    [VSCode] Fixed extension failing to activate on Windows.

  7. Claude Code

    Claude Code 2.1.136

    2 new46 fixes4 other

    Added CLAUDE_CODE_ENABLE_FEEDBACK_SURVEY_FOR_OTEL to re-enable the session quality survey for enterprises capturing responses through OpenTelemetry. Added settings.autoMode.hard_deny for auto mode classifier rules that block unconditionally regardless of user intent or allow exceptions.

  8. Claude Code

    Claude Code 2.1.133

    3 new10 fixes4 other

    Added worktree.baseRef setting (fresh | head) to choose whether --worktree, EnterWorktree, and agent-isolation worktrees branch from origin/ or local HEAD. Note: the default fresh changes EnterWorktree's base back to origin/ (it has been local HEAD since 2.1.128) — set worktree.baseRef: "head" to keep unpushed commits in new worktrees. Added sandbox.bwrapPath and sandbox.socatPath managed settings (Linux/WSL) to specify custom bubblewrap and socat binary locations.

  9. Claude Code

    Claude Code 2.1.132

    3 new23 fixes2 other

    Added CLAUDE_CODE_SESSION_ID environment variable to the Bash tool subprocess environment, matching the session_id passed to hooks. Added CLAUDE_CODE_DISABLE_ALTERNATE_SCREEN=1 env var to opt out of the fullscreen alternate-screen renderer and keep the conversation in the terminal's native scrollback.

  10. Claude Code

    Claude Code 2.1.131

    2 fixes

    Fixed VS Code extension failing to activate on Windows due to a hardcoded build path in the bundled SDK (createRequire polyfill bug). Fixed Mantle endpoint authentication failing with missing x-api-key header.

  11. Claude Code

    Claude Code 2.1.129

    3 new17 fixes7 other

    Added --plugin-url flag to fetch a plugin .zip archive from a URL for the current session. Added CLAUDE_CODE_FORCE_SYNC_OUTPUT=1 env var to force-enable synchronized output on terminals that auto-detection misses (e.g. Emacs eat).

  12. Claude API

    Multiagent orchestration and Outcomes are now in beta under the standard managed-agents-2026-04-01 beta header

    Claude Managed Agents vault credential background refresh is now supported for mcp_oauth credentials. Webhooks for Claude Managed Agents are now supported. Additional filtering and sorting options are now supported for Claude Managed Agents. Dreams for Claude Managed Agents are now available as a research preview.

  13. Claude Code

    Claude Code 2.1.128

    25 fixes12 other

    Bare /color (no args) now picks a random session color. /mcp now shows the tool count for connected servers and flags servers that connected with 0 tools.

  14. Claude API

    We’ve launched Workload Identity Federation

    Authenticate workloads to the Claude API with short-lived OIDC tokens from your own identity provider (AWS IAM, Google Cloud, GitHub Actions, Kubernetes, Microsoft Entra ID, Okta, SPIFFE, and more) instead of long-lived static API keys. Configure issuers and federation rules in the Claude Console, and the SDK handles token exchange and refresh automatically.

  15. Claude Code

    Claude Code 2.1.126

    19 fixes13 other

    The /model picker now lists models from your gateway's /v1/models endpoint when ANTHROPIC_BASE_URL points at an Anthropic-compatible gateway. - Added claude project purge [path] to delete all Claude Code state for a project (transcripts, tasks, file history, config entry) — supports --dry-run, -y/--yes, -i/--interactive, and --all.

  16. Claude API

    We’ve retired the 1M token context window beta for Claude Sonnet 4.5 and Claude Sonnet 4

    The beta header now has no effect on these models, and requests exceeding the standard 200k-token context window return an error. To use the 1M context window, migrate to Claude Sonnet 4.6 or Claude Opus 4.6, where it’s included at standard pricing with no beta header required.

  17. Claude Code

    Claude Code 2.1.123

    1 fix

    Fixed OAuth authentication failing with a 401 retry loop when CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS=1 is set.

  18. Claude API

    We’ve released the Claude API skill, an open-source Agent Skill that gives Claude up-to-date reference…

    The skill is bundled with Claude Code and available in the Anthropic skills repository.

  19. Claude Code

    Claude Code 2.1.122

    2 new11 fixes5 other

    Added ANTHROPIC_BEDROCK_SERVICE_TIER environment variable to select a Bedrock service tier (default, flex, or priority), sent as the X-Amzn-Bedrock-Service-Tier header. OpenTelemetry: added claude_code.at_mention log event for @-mention resolution.

  20. Claude Code

    Claude Code 2.1.121

    4 new18 fixes17 other

    Added alwaysLoad option to MCP server config — when true, all tools from that server skip tool-search deferral and are always available. Added claude plugin prune to remove orphaned auto-installed plugin dependencies; plugin uninstall --prune cascades.

  21. Claude API

    We’ve released the Rate Limits API, allowing administrators to programmatically query the rate limits…

  22. Claude Code

    Claude Code 2.1.119

    2 new32 fixes17 other

    Added prUrlTemplate setting to point the footer PR badge at a custom code-review URL instead of github.com. Added CLAUDE_CODE_HIDE_CWD environment variable to hide the working directory in the startup logo.

  23. Claude Code

    Claude Code 2.1.118

    4 new21 fixes9 other

    Added vim visual mode (v) and visual-line mode (V) with selection, operators, and visual feedback. Added DISABLE_UPDATES env var to completely block all update paths including manual claude update — stricter than DISABLE_AUTOUPDATER.

  24. Claude API

    Memory for Claude Managed Agents is now in beta under the standard managed-agents-2026-04-01 header

  25. Claude Code

    Claude Code 2.1.117

    14 fixes14 other

    Forked subagents can now be enabled on external builds by setting CLAUDE_CODE_FORK_SUBAGENT=1. Agent frontmatter mcpServers are now loaded for main-thread agent sessions via --agent.

  26. Claude Code

    Claude Code 2.1.116

    12 fixes12 other

    /resume on large sessions is significantly faster (up to 67% on 40MB+ sessions) and handles sessions with many dead-fork entries more efficiently. Faster MCP startup when multiple stdio servers are configured; resources/templates/list is now deferred to first @-mention.

  27. Claude API

    We’ve retired the Claude Haiku 3 model

    All requests to this model will now return an error. We recommend upgrading to Claude Haiku 4.5.

  28. Claude Code

    Claude Code 2.1.114

    1 fix

    Fixed a crash in the permission dialog when an agent teams teammate requested tool permission.

  29. Claude Code

    Claude Code 2.1.113

    1 new22 fixes15 other

    Added sandbox.network.deniedDomains setting to block specific domains even when a broader allowedDomains wildcard would otherwise permit them.

  30. Claude appsAnnouncement

    Claude Design by Anthropic Labs

    With Opus 4.7, we also launched Claude Design, a new Anthropic Labs product that lets you collaborate with Claude to create visual outputs like designs, prototypes, slides, and one-pagers.