Claude Code 2.1.273 release notes

Version

2.1.273

Released

15 September 2026

Status

Stable release

What's new in Claude Code 2.1.273

The official notes for Claude Code 2.1.273 list 64 changes: 3 new features, 20 fixes, 1 performance improvement, 2 security changes and 38 other changes.

• 3 new features
• 20 fixes
• 1 performance improvement
• 2 security changes
• 38 other changes

Highlights

• security change Fixed 401/403 errors on Bedrock, Vertex and Foundry, and Claude apps gateway 403s, telling you to run /login; the message…
• security change [Claude Tag] Fixed OAuth client-credentials and JWT-bearer connections failing with providers that return a lowercase token type; requests now send…
• new feature Added x-claude-code-request-class, x-claude-code-agent-type, x-claude-code-prev-tool-durations, x-claude-code-compaction and x-claude-code-context-compacted request headers for LLM gateways; opt in with CLAUDE_CODE_GATEWAY_HINT_HEADERS=1
• new feature Added a notification when an MCP server disconnects mid-session and automatic reconnection gives up, pointing at /mcp
• new feature Added forking a session started with claude --remote-control or /remote-control from the Claude app; the fork runs as a background…

Our short summary: changes are counted and classified automatically from the official notes, and highlights are shortened. The complete, authoritative list is in the official release notes on GitHub.

Full release notes on GitHub (Claude Code 2.1.273)

All Claude Code release notes · All releases

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