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Claude Code 2.1.316: subagent effort becomes a setting, ultrathink gets a kill switch, and Opus fast mode has 30 days left

Claude Code 2.1.316 hit npm at 00:42 UTC this morning. I read the changelog over coffee because this release touches the three things I care about most in an agent config: what effort level subagents run at, what the ultrathink keyword costs, and which model settings quietly carry an expiry date. O…

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Timeline · 4 reports

  1. 2026-11-01 17:53 · DEV Community — AI
    Claude Opus 4.8 Fast Mode Is Retiring: A Safe Migration Playbook
  2. 2026-11-01 02:01 · DEV Community — AI
    Claude Code 2.1.316 Stops Asking Before Your Org's Managed Settings Apply
  3. 2026-10-31 20:37 · DEV Community — AI
    Claude Code 2.1.316 Adds a Subagent Effort Dial, Sunsets Fast Mode
  4. 2026-10-31 08:48 · DEV Community — AI
    Claude Code 2.1.316: subagent effort becomes a setting, ultrathink gets a kill switch, and Opus fast mode has 30 days left

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