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Anthropic releases Opus 5.5, claims strongest model tested, 40% cheaper than Opus 5

#anthropic#opus-5.5#llm#pricing

Anthropic released Opus 5.5 on September 22, 2026, describing it as the strongest-performing model it has tested to date. The company says Opus 5.5 matches Fable 5.1 on most tasks while costing about 40% less to run than Opus 5, with pricing at $4 per million input tokens and $20 per million output tokens.

Coverage timeline

  1. TechCrunch AIRussell Brandom
    Anthropic releases Opus 5.5 with lower prices and Fable-level performance

    Anthropic called it "the strongest-performing model we've tested to date."

  2. Techmeme
    Anthropic says Opus 5.5 matches Fable 5.1 "on most tasks" while costing about 40% less to run than Opus 5; Opus 5.5 costs $4/1M input and $20/1M output tokens (Matthias Bastian/The Decoder)

    Matthias Bastian / The Decoder : Anthropic says Opus 5.5 matches Fable 5.1 “on most tasks” while costing about 40% less to run than Opus 5; Opus 5.5 costs $4/1M input and $20/1M output tokens — Ask about this article... According to Anthropic, Opus 5.5 matches Claude Fable 5.1 “on most tasks” while costing about 40 percent less to run than Opus 5.

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