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Claude Code 2.1.311: Ultrathink Now Hits xhigh Via the API

This story is from 2026-10-28. It is preserved in the archive; the latest stories are on the live feed.

Claude Code 2.1.311 (Oct 26) maps the ultrathink keyword to xhigh effort on 4 named models through the API 2.1.312 (Oct 27) renames the usage window from "session limit" to "5-hour limit" everywhere it shows up Cloud routines can now pick an effort level in the model picker before a scheduled run e…

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  1. 2026-10-28 21:50 · DEV Community — AI
    Claude Code 2.1.311: Ultrathink Now Hits xhigh Via the API

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