Claude Opus 5.5 benchmarks vs Fable 5.1, Opus 5, GPT-6 Astra and GPT-5.6 Sol, row by row, with the footnotes explained and independent results side by side.
Key takeaways
- Anthropic's chart shows Claude Opus 5.5 leading seven of nine rows. GPT-6 Astra leads on business workflows and agentic science research.
- In the six rows with an Astra number, Opus 5.5 leads four. Three rows have no Astra number, and two have no OpenAI number at all.
- Several leads are within noise, including FrontierCode by 1.1 points and Chartography by 0.6.
- On Terminal-Bench 4.0, Anthropic's chart shows an 8.5-point lead over Astra. Artificial Analysis's own run shows 1 point.
- Independently, Opus 5.5 scores 58 on the Artificial Analysis index, against 53 for Fable 5.1 and Astra, 51 for Opus 5 and 47 for GPT-5.6 Sol.
📖 Read the full guide on Van Data Team → Claude Opus 5.5 Benchmarks: What the Chart Shows and Hides
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