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Written by AI from the official notes. Check them for exact details.Claude Code 2.1.278 introduces a new server-side classifier mode and updates the status endpoint.
- Auto mode now defaults to server-side classifier for API and Enterprise users.
- No charges for classifier overhead with server-side mode.
- New
/statusrow indicates if auto mode classifier is server-based.
Why it matters: API and Enterprise users should review these changes to manage costs effectively.
Full release notes2 changes
What's changed
- 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=0opts out on Bedrock, Vertex, Foundry and gateways); warns on billed fallback. See https://code.claude.com/docs/en/auto-mode-classifier-billing - Added an
Auto mode serverrow to/statusshowing whether this session's auto mode classifier runs on the server