Anthropic ships Claude Opus 5.5: cheaper by up to 40% and pulling Codex users back to Claude
danshipper · x · 2026-09-23
- Anthropic officially released Claude Opus 5.5, available today.
- Every's team tested it across coding, design, writing, and knowledge work: it sometimes beats Fable 5.1 and costs up to 40% less than Opus 5.
- Coding is the standout: excellent at end-to-end builds that match your taste; team member kieranklaassen is replacing Fable 5.1 with Opus for daily product work, calling it his new favorite model.
- It produces legible prose (reading ease score 68.42) but still trails Astra on writing tasks.
- Verdict: a strong contender for a new daily driver model.
Related event: Anthropic Launches Claude Opus 5.5: Stronger, 40% Cheaper, Tops AA Index(259 posts)→
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