v2.1.25 Claude Code Release Notes

Jan 29, 2026

Claude's Analysisby Sonnet 4.6

Fixes beta header validation errors blocking Bedrock and Vertex gateway users; the experimental-betas disable flag now reliably prevents the error.

Change

Total Changes (vs Average)

0.1×

Version Type

Patch

Release Focus

Bug Fix

Day Since Prior Release

Release # This Month

#24 of 26

Bug Fix Ratio

100%

Post-Release Edits

—

Change Category

Ecosystem Impact

Key Themes

1Cloud Gateway Beta Header Fix

May Help If You've Noticed

Claude Code throws a validation error when connecting through a Bedrock or Vertex gateway

Fixed1 change

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

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v2.1.25 Claude Code Release Notes

Jan 29, 2026

Claude's Analysisby Sonnet 4.6

Full Analysis

Fixes beta header validation errors blocking Bedrock and Vertex gateway users; the experimental-betas disable flag now reliably prevents the error.

Change

Total Changes (vs Average)

0.1×

Version Type

Patch

Release Focus

Bug Fix

Day Since Prior Release

Release # This Month

#24 of 26

Bug Fix Ratio

100%

Post-Release Edits

—

Change Category

Ecosystem Impact

Key Themes

1Cloud Gateway Beta Header Fix

May Help If You've Noticed

Claude Code throws a validation error when connecting through a Bedrock or Vertex gateway

Fixed1 change

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

v2.1.25 Claude Code Release Notes

Changes in Claude Code v2.1.25

Fixed1 change

v2.1.25 Claude Code Release Notes

Changes in Claude Code v2.1.25

Fixed1 change