Model

claude-opus-5.5

2 entries · September 2026 – September 2026

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  • Models & capabilities 2
  • Benchmarks & progress 2

  1. Anthropic releases Claude Sonnet 5.5

    Priced the same as Sonnet 5, at $2 and $10 per million input and output tokens, but scoring 70.6% on Terminal-Bench 4.0 against Sonnet 5's 10.3%.

    AnthropicModels & capabilities · Benchmarks & progress

  2. Anthropic releases Claude Opus 5.5

    Anthropic said Opus 5.5 matches Fable 5.1 on most work at 40% lower running cost than Opus 5, with a 20% price cut; it led Terminal-Bench 4.0 and Artificial Analysis's GDPval-AA board.

    Anthropic, METRModels & capabilities · Benchmarks & progress