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Developing story · 2 episodes · 24 Sept to 25 Sept

Anthropic's Cost Effective AI Model Dominates Benchmarks

Anthropic launched Claude Opus 5.5 with significantly reduced costs, immediately challenging the market. The new model has since outperformed OpenAI's Astra and Fable 5.1 on key benchmarks.

  1. Generative AI & Modelsnew

    Claude Opus 5.5 tops benchmark over OpenAI’s Astra and Fable 5.1

    Anthropic’s new model, Claude Opus 5.5, ranked first in the Intelligence Index benchmark by Artificial Analysis, surpassing OpenAI’s GPT-6 Astra and Anthropic’s own Fable 5.1. The index aggregates…

    1 source
  2. Generative AI & Modelsnew

    Anthropic releases Claude Opus 5.5 with 40% lower costs

    Anthropic has released Claude Opus 5.5, a model designed to reduce costs for developers using long-running, context-heavy coding sessions. The company estimates the new model costs about 40% less to…

    4 sources primary source
Who and what
ClaudeAnthropicOpenAIArtificial AnalysisClaude Opus 5.5Claude Fable 5.1Claude Opus 5Claude Sonnet 5Claude HaikuClaude Sonnet 5.5Claude Haiku 5.5Claude Mythos 5.1
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