ClaudeUpdates.dev
Update Claude Code
ClaudeUpdates.dev
401 releases|Latest v2.1.278|Last Update Sep 19, 2026
Update Claude Code
v2.1.277Older
2.1.276
2.1.277
2.1.278
2.1.277
2.1.278
← Back to all releases

v2.1.278 Claude Code Release Notes

Sep 19, 2026
GPT-5.6's Analysisby Sol
Full Analysis

Auto mode now defaults to server-side classification across API, Enterprise, and cloud deployments, avoiding classifier overhead by default.

Changes
2
Total Changes (vs Average)
0.1×
Version Type
Patch
Release Focus
Feature
Days Since Prior Release
0
Release # This Month
#20 of 20
Bug Fix Ratio
0%
Post-Release Edits
—
Change Category
Ecosystem Impact
Cloud deployment support remains concentrated: Bedrock appeared in 7 of the last 10 releases, while Vertex, Foundry, and Team / Enterprise each appeared in 6.
Key Themes
1Lower-cost auto mode default|1Classifier visibility
May Help If You've Noticed
Auto mode adds unexpected classifier charges without making the fallback clear.
You cannot tell whether the current session classifies auto-mode requests on the server.

Changes in Claude Code v2.1.278

Added1 change

  • •Added an Auto mode server row to /status showing whether this session's auto mode classifier runs on the server

Changed1 change

  • •Changed auto mode for Claude API and Enterprise users, and on Bedrock, Vertex, Foundry and gateways, to default to the server-side classifier, which does not charge for classifier overhead (CLAUDE_CODE_AUTO_MODE_SERVER=0 opts out on Bedrock, Vertex, Foundry and gateways); warns on billed fallback. See https://code.claude.com/docs/en/auto-mode-classifier-billing

← v2.1.277
All Releases