Anthropic Releases Opus 5.5, OpenAI Unveils New Models

Anthropic and OpenAI are racing to cut prices ~20-50% on mid-tier models while claiming near-frontier performance gains.

• Opus 5.5 pricing: Anthropic's Claude Opus 5.5 cuts output-token costs to $20/million from $25 (a 20-40% reduction cited variously), landing two months after Opus 5 (July 24).
• Performance claims: Anthropic says Opus 5.5 matches Claude Fable 5.1 on most tasks, beats Opus 5 on agentic coding/computer use, runs 30%+ faster, and needs less compute to serve.

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