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Claude Code 2.1.316 Adds a Subagent Effort Dial, Sunsets Fast Mode

Claude Code 2.1.316 landed October 31 with new environment variables for ultrathink and subagent effort control. Opus 4.8 fast mode is deprecated today and removed November 30, 2026, with Opus 5.5 as the replacement. The release ships 5 improvements and 34 bug fixes alongside gateway budget pooling…

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Timeline · 2 reports

  1. 2026-11-01 02:01 · DEV Community — AI
    Claude Code 2.1.316 Stops Asking Before Your Org's Managed Settings Apply
  2. 2026-10-31 20:37 · DEV Community — AI
    Claude Code 2.1.316 Adds a Subagent Effort Dial, Sunsets Fast Mode

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