Claude Code Release Notes

Claude Code v2.1.25 Release Notes

Claude Code v2.1.25 fixes beta header validation errors for Bedrock and Vertex gateway users, improving compatibility with experimental beta settings.

January 29, 2026 • 2 min read • By Claude World

Claude Code v2.1.25 brings an important stability fix for users working with cloud gateway services. This patch release specifically addresses validation issues that were affecting developers using Bedrock and Vertex AI platforms.

What’s New

Beta Header Validation Fix

This release resolves a critical beta header validation error that was impacting gateway users on Amazon Bedrock and Google Vertex AI platforms. The fix ensures that when you set CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS=1 in your environment, the system properly bypasses experimental features without throwing validation errors.

This improvement is particularly valuable for:

  • Production environments where experimental features should remain disabled
  • Enterprise users requiring stable, predictable behavior
  • Developers working with strict compliance requirements

How to Update

To update to Claude Code v2.1.25, follow these steps:

  1. Via Package Manager: Update through your preferred package manager
  2. Direct Download: Download the latest version from the GitHub releases page
  3. Environment Configuration: Ensure your CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS setting is properly configured if you’re using gateway services

After updating, verify that your Bedrock or Vertex AI integrations are working correctly, especially if you’re using the experimental beta disable flag.