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Claude Fable 5.1 Benchmarks: Every Number Compared
All nine Claude Fable 5.1 benchmarks against Fable 5, Opus 5 and GPT-5.6 Sol, plus the 75 percent…
The Lab · Written in the open · Tagged Benchmarks
Working notes from the studio. The tools I build, the workflows I keep, the mistakes I paid for.
3 entries · latest 2026-09-04
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OpenAI's GPT-6 Astra ships at 10 USD in and 50 USD out per 1M tokens. The benchmark wins are real, and three headline numbers carry caveats.
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8 min read
All nine Claude Fable 5.1 benchmarks against Fable 5, Opus 5 and GPT-5.6 Sol, plus the 75 percent…
8 min read
Opus 5 posts 79.2 on SWE-bench Pro against Opus 4.8 at 69.2. What the launch ratios mean, and…