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Claude Opus 5.5: What Changed, What Breaks, and Whether to Switch

This story is from 2026-10-06. It is preserved in the archive; the latest stories are on the live feed.

In September 2026, Anthropic's CEO Dario Amodei published an essay with this line in it: "We must slow the pace at which we improve the capabilities of AI models." A week after, on September 22, 2026, Anthropic released Claude Opus 5.5 . It landed just three weeks after Fable 5.1, so people had jok…

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  1. 2026-10-06 19:03 · DEV Community — AI
    Claude Opus 5.5: What Changed, What Breaks, and Whether to Switch

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