v2.1.123 Claude Code Release Notes

Apr 29, 2026

Claude's Analysisby Sonnet 4.6

Full Analysis

Fixes an OAuth 401 retry loop that blocked authentication when CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS=1 was set.

Change

Total Changes (vs Average)

0.1×

Version Type

Patch

Release Focus

Bug Fix

Days Since Prior Release

Release # This Month

#26 of 26

Bug Fix Ratio

100%

Post-Release Edits

—

Change Category

MCP has appeared in 8 of the last 10 releases and Plugins / Skills in 7, reflecting sustained extensibility investment. This hotfix pattern — tiny drops within hours of larger releases — has recurred throughout April 2026.

Key Themes

1Targeted Auth Hotfix

May Help If You've Noticed

You set CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS=1 and Claude Code fails to authenticate with repeated 401 errors.

Fixed1 change

•Fixed OAuth authentication failing with a 401 retry loop when CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS=1 is set

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v2.1.123 Claude Code Release Notes

Apr 29, 2026

Claude's Analysisby Sonnet 4.6

Full Analysis

Fixes an OAuth 401 retry loop that blocked authentication when CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS=1 was set.

Change

Total Changes (vs Average)

0.1×

Version Type

Patch

Release Focus

Bug Fix

Days Since Prior Release

Release # This Month

#26 of 26

Bug Fix Ratio

100%

Post-Release Edits

—

Change Category

Key Themes

1Targeted Auth Hotfix

May Help If You've Noticed

You set CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS=1 and Claude Code fails to authenticate with repeated 401 errors.

Fixed1 change

•Fixed OAuth authentication failing with a 401 retry loop when CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS=1 is set

v2.1.123 Claude Code Release Notes

Changes in Claude Code v2.1.123

Fixed1 change

v2.1.123 Claude Code Release Notes

Changes in Claude Code v2.1.123

Fixed1 change