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Claude Opus 5.5: Frontier Coding Agents Compete on Cost, Clarity, and Kill Rails

This story is from 2026-09-23. It is preserved in the archive; the latest stories are on the live feed.

A pacing-era flagship with a price cut On 22 September 2026, Anthropic introduced Claude Opus 5.5 , the first model in its Claude 5.5 family. Per Anthropic’s announcement , Opus 5.5 performs at the level of Claude Fable 5.1 on most work while costing about 40% less to run than Opus 5 on typical wor…

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  1. 2026-09-23 06:39 · DEV Community — AI
    Claude Opus 5.5: Frontier Coding Agents Compete on Cost, Clarity, and Kill Rails

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