Claude Code v2.1.278
Claude Code v2.1.278 was released on .
Summary
Claude Code 2.1.278 now runs auto mode more efficiently by defaulting to server-side processing, which means no extra charges for most users. We've also added better visibility into how your auto mode is working. Check out the full details to see what this means for your workf...
Release Context
- This was the 223rd Claude Code release of 2026 tracked by Havoptic.
- It shipped the same day as Claude Code v2.1.277 (September 18, 2026).
Shipped around the same time
Within 3 days of this release, other AI coding tools also shipped:
- Grok Build v1.0.41 (September 22, 2026)
- Factory Droid v0.225.0 (September 22, 2026)
- Amp 2026.09.22 (September 22, 2026)
- v0 2026.09.22 (September 22, 2026)
- OpenCode v1.18.32 (September 21, 2026)
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Release Notes
- 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 (CLAUDECODEAUTOMODESERVER=0 opts 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 server row to /status showing whether this session's auto mode classifier runs on the server
Other Recent Claude Code Releases
- v2.1.325 (November 13, 2026)
- v2.1.323 (November 12, 2026)
- v2.1.322 (November 10, 2026)
- v2.1.321 (November 9, 2026)
- v2.1.319 (November 6, 2026)
Upgrading from v2.1.278? See all 40 releases since.
All Claude Code releases · All AI coding tool releases on Havoptic