Claude Code 2.1.122 release notes

Version

2.1.122

Released

28 April 2026

Status

Stable release

What's new in Claude Code 2.1.122

The official notes for Claude Code 2.1.122 list 18 changes: 1 new feature, 11 fixes and 6 other changes.

• 1 new feature
• 11 fixes
• 6 other changes

Highlights

• new feature 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
• fix Fixed /branch producing forks that fail with "tool_use ids were found without tool_result blocks" when the source session contained entries…
• fix Fixed /model not showing the Effort option for Bedrock application inference profile ARNs, and those ARNs not receiving output_config.effort
• fix Fixed Vertex AI / Bedrock returning invalid_request_error: output_config: Extra inputs are not permitted on session-title generation and other structured-output queries
• fix Fixed Vertex AI count_tokens endpoint returning 400 errors for users behind proxy gateways

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 2.1.122)

All Claude Code release notes · All releases

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