Anthropic Launches Claude Opus 5.5: Flagship Performance at 40% Lower Cost

Anthropic released Claude Opus 5.5, claiming it matches the performance of its flagship Claude Fable 5.1 in most tasks while costing 40% less to run than its predecessor, Claude Opus 5. This marks a significant price-performance improvement in the AI model market, potentially intensifying competitive pressure on rivals like OpenAI and Google. The claim is based on Anthropic's internal benchmarks, which are not independently verified.