LaunchDevelopersSeptember 19, 2026

Claude Code 2.1.278 defaults auto mode to server-side classifier

Claude Code v2.1.278 switches auto mode for Claude API and Enterprise users, plus Bedrock, Vertex, Foundry and gateways, 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; a new Auto mode server row in /status shows where the classifier runs.

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