Anthropic officially launched Claude Opus 5.5 as the frontier pioneer of the new Claude 5.5 family. Benchmark audits show Opus 5.5 matches previous flagship Claude Fable 5.1 on core agentic coding and reasoning tasks while slicing operating costs by 40% compared to Opus 5. API pricing is set at $4/M input and $20/M output with $0.20/M prompt cache reads.

Key Takeaways

  • ✓Flagship launch kicking off Claude 5.5 family, matching Claude Fable 5.1 performance on primary workflows.
  • ✓Operating costs slashed by ~40% with over 30% faster token output speed.
  • ✓API pricing at $4/M input, $20/M output, and $0.20/M prompt cache reads ($5/M cache write).
  • ✓Highest automated behavioral safety audit score recorded by Anthropic to date.
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Project Links & Resources

Direct Access
Direct access to official project resources and documentation
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Anthropic Claude Opus 5.5 Announcement · Official post
www.anthropic.com/news/claude-opus-5-5
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Anthropic API · Documentation
docs.anthropic.com/en/docs/models-overview
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Anthropic Console Workbench · Product page
console.anthropic.com
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In-Depth Technical Analysis

Breakthrough &

Strategy Anthropic launches Claude Opus 5.5, designed to bring frontier capability into everyday production budgets.

Technical

Highlights

  1. Over 30% faster token generation speeds;
  2. 40% reduction in typical operating costs with prompt cache reads priced at just $0.20/MTok;
  3. Highest safety and alignment scores in Anthropic's automated behavioral audits.

Benchmark

Results Opus 5.5 matches Claude Fable 5.1 across reasoning and agentic programming evaluations, setting top marks on IDE benchmarks.

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