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Release notes

What's new in Claude

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.

All 1,230 Claude436 Codex132 Gemini516 Grok53 Mistral68 DeepSeek22 Meta3

Everything Claude Code Claude apps New models Claude API

Claude Code

NewerPage 6 of 8Older

Apr 8, 2026

Claude Code 2.1.96

1 fix

Fixed Bedrock requests failing with 403 "Authorization header is missing" when using AWS_BEARER_TOKEN_BEDROCK or CLAUDE_CODE_SKIP_BEDROCK_AUTH (regression in 2.1.94).

Claude CodeApr 7, 2026

Claude Code 2.1.94

5 new16 fixes4 other

Added support for Amazon Bedrock powered by Mantle, set CLAUDE_CODE_USE_MANTLE=1. Added compact Slacked #channel header with a clickable channel link for Slack MCP send-message tool calls.

Claude CodeApr 4, 2026

Claude Code 2.1.92

3 new11 fixes7 other

Added forceRemoteSettingsRefresh policy setting: when set, the CLI blocks startup until remote managed settings are freshly fetched, and exits if the fetch fails (fail-closed). Added interactive Bedrock setup wizard accessible from the login screen when selecting "3rd-party platform" — guides you through AWS authentication, region configuration, credential verification, and model pinning.

Claude CodeApr 2, 2026

Claude Code 2.1.91

3 new5 fixes5 other

Added MCP tool result persistence override via _meta["anthropic/maxResultSizeChars"] annotation (up to 500K), allowing larger results like DB schemas to pass through without truncation. Added disableSkillShellExecution setting to disable inline shell execution in skills, custom slash commands, and plugin commands.

Claude CodeApr 1, 2026

Claude Code 2.1.90

3 new9 fixes7 other

Added /powerup — interactive lessons teaching Claude Code features with animated demos. Added CLAUDE_CODE_PLUGIN_KEEP_MARKETPLACE_ON_FAILURE env var to keep the existing marketplace cache when git pull fails, useful in offline environments.

Claude CodeApr 1, 2026

Claude Code 2.1.89

5 new30 fixes17 other

Added "defer" permission decision to PreToolUse hooks — headless sessions can pause at a tool call and resume with -p --resume to have the hook re-evaluate. Added CLAUDE_CODE_NO_FLICKER=1 environment variable to opt into flicker-free alt-screen rendering with virtualized scrollback.

Claude CodeMar 29, 2026

Claude Code 2.1.87

1 fix

Fixed messages in Cowork Dispatch not getting delivered.

Claude CodeMar 27, 2026

Claude Code 2.1.86

2 new16 fixes8 other

Added X-Claude-Code-Session-Id header to API requests so proxies can aggregate requests by session without parsing the body. Added .jj and .sl to VCS directory exclusion lists so Grep and file autocomplete don't descend into Jujutsu or Sapling metadata.

Claude CodeMar 26, 2026

Claude Code 2.1.85

4 new17 fixes9 other

Added CLAUDE_CODE_MCP_SERVER_NAME and CLAUDE_CODE_MCP_SERVER_URL environment variables to MCP headersHelper scripts, allowing one helper to serve multiple servers. Added conditional if field for hooks using permission rule syntax (e.g., Bash(git *)) to filter when they run, reducing process spawning overhead.

Claude CodeMar 26, 2026

Claude Code 2.1.84

9 new14 fixes17 other

Added PowerShell tool for Windows as an opt-in preview. Learn more at https://code.claude.com/docs/en/tools-reference#powershell-tool. Added ANTHROPIC_DEFAULT_{OPUS,SONNET,HAIKU}_MODEL_SUPPORTS env vars to override effort/thinking capability detection for pinned default models for 3p (Bedrock, Vertex, Foundry), and _MODEL_NAME/_DESCRIPTION to customize the /model picker label.

Claude CodeMar 25, 2026

Claude Code 2.1.83

7 new32 fixes20 other

Added managed-settings.d/ drop-in directory alongside managed-settings.json, letting separate teams deploy independent policy fragments that merge alphabetically. Added CwdChanged and FileChanged hook events for reactive environment management (e.g., direnv).

Claude CodeMar 20, 2026

Claude Code 2.1.81

2 new17 fixes8 other

Added --bare flag for scripted -p calls — skips hooks, LSP, plugin sync, and skill directory walks; requires ANTHROPIC_API_KEY or an apiKeyHelper via --settings (OAuth and keychain auth disabled); auto-memory fully disabled. Added --channels permission relay — channel servers that declare the permission capability can forward tool approval prompts to your phone.

Claude CodeMar 19, 2026

Claude Code 2.1.80

5 new6 fixes6 other

Added rate_limits field to statusline scripts for displaying Claude.ai rate limit usage (5-hour and 7-day windows with used_percentage and resets_at). Added source: 'settings' plugin marketplace source — declare plugin entries inline in settings.json.

Claude CodeMar 18, 2026

Claude Code 2.1.79

3 new11 fixes4 other

Added --console flag to claude auth login for Anthropic Console (API billing) authentication. Added "Show turn duration" toggle to the /config menu.

Claude CodeMar 17, 2026

Claude Code 2.1.78

4 new19 fixes3 other

Added StopFailure hook event that fires when the turn ends due to an API error (rate limit, auth failure, etc.). Added ${CLAUDE_PLUGIN_DATA} variable for plugin persistent state that survives plugin updates; /plugin uninstall prompts before deleting it.

Claude CodeMar 17, 2026

Claude Code 2.1.77

1 new28 fixes15 other

Added allowRead sandbox filesystem setting to re-allow read access within denyRead regions.

Claude CodeMar 14, 2026

Claude Code 2.1.76

7 new20 fixes8 other

Added MCP elicitation support — MCP servers can now request structured input mid-task via an interactive dialog (form fields or browser URL). Added new Elicitation and ElicitationResult hooks to intercept and override responses before they're sent back.

Claude CodeMar 13, 2026

Claude Code 2.1.75

Claude CodeMar 12, 2026

Claude Code 2.1.74

2 new13 fixes2 other

Added actionable suggestions to /context command — identifies context-heavy tools, memory bloat, and capacity warnings with specific optimization tips. Added autoMemoryDirectory setting to configure a custom directory for auto-memory storage.

Claude CodeMar 11, 2026

Claude Code 2.1.73

2 new16 fixes8 other

Added modelOverrides setting to map model picker entries to custom provider model IDs (e.g. Bedrock inference profile ARNs). Added actionable guidance when OAuth login or connectivity checks fail due to SSL certificate errors (corporate proxies, NODE_EXTRA_CA_CERTS).

Claude CodeMar 10, 2026

Claude Code 2.1.72

9 new32 fixes13 other

Added w key in /copy to write the focused selection directly to a file, bypassing the clipboard (useful over SSH). Added optional description argument to /plan (e.g., /plan fix the auth bug) that enters plan mode and immediately starts.

Claude CodeMar 7, 2026

Claude Code 2.1.71

4 new18 fixes6 other

Added /loop command to run a prompt or slash command on a recurring interval (e.g. /loop 5m check the deploy). Added cron scheduling tools for recurring prompts within a session.

Claude CodeMar 6, 2026

Claude Code 2.1.70

3 new20 fixes6 other

[VSCode] Added spark icon in VS Code activity bar that lists all Claude Code sessions, with sessions opening as full editors. [VSCode] Added full markdown document view for plans in VS Code, with support for adding comments to provide feedback.

Claude CodeMar 5, 2026

Claude Code 2.1.69

21 new58 fixes24 other

Added the /claude-api skill for building applications with the Claude API and Anthropic SDK. Added Ctrl+U on an empty bash prompt (!) to exit bash mode, matching escape and backspace.

Claude CodeMar 4, 2026

Claude Code 2.1.68

3 other

Opus 4.6 now defaults to medium effort for Max and Team subscribers. Medium effort works well for most tasks — it's the sweet spot between speed and thoroughness. You can change this anytime with /model. Re-introduced the "ultrathink" keyword to enable high effort for the next turn.

Claude CodeMar 4, 2026

Claude Code 2.1.66

Claude CodeFeb 28, 2026

Claude Code 2.1.63

6 new17 fixes3 other

Added /simplify and /batch bundled slash commands. Added ENABLE_CLAUDEAI_MCP_SERVERS=false env var to opt out from making claude.ai MCP servers available.

Claude CodeFeb 27, 2026

Claude Code 2.1.62

1 fix

Fixed prompt suggestion cache regression that reduced cache hit rates.

Claude CodeFeb 26, 2026

Claude Code 2.1.61

1 fix

Fixed concurrent writes corrupting config file on Windows.

Claude CodeFeb 26, 2026

Claude Code 2.1.59

1 new2 fixes4 other

Added /copy command to show an interactive picker when code blocks are present, allowing selection of individual code blocks or the full response.