Anthropic ships Opus 5.5: beats Fable 5.1 in some tests, up to 40% cheaper than Opus 5
RichmanRonald · x · 2026-09-23
Anthropic just released Claude Opus 5.5. Early testing at Every shows:
- Coding: excellent at end-to-end builds that match your taste; the author now picks Opus over Fable for large projects, and Kieran Klaassen calls it his new daily driver, replacing Fable 5.1 — pulling some Codex converts back to Claude.
- Pricing: up to 40% cheaper than Opus 5.
- Writing: legible prose (68.42 reading ease), but still trails Astra on writing tasks.
Overall a strong contender as 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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