Dan Shipper Publishes Writing Evals Comparing Opus 5.5, Opus 5, Astra and 5.6
danshipper · x · 2026-09-23
Dan Shipper shares his writing evals comparing Opus 5.5, Opus 5, Astra and 5.6 on his real-world writing tasks, recommending readers go through them with their agent. The quoted post notes that another user's personal benchmark found Opus 5.5 at "Fable level" on many actual work tasks, though it ran too long to score on a few.
Related event: Anthropic Launches Claude Opus 5.5: Stronger, 40% Cheaper, Tops AA Index(259 posts)→
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