AnthropicLaunchAI ModelsSeptember 28, 2026

Anthropic releases Claude Sonnet 5.5, 30% faster than Sonnet 5

Read original source →anthropic.com

Sonnet 5.5 is the second model in the Claude 5.5 family after Opus 5.5, priced unchanged at $2/$10 per million tokens with $0.20 cache reads and a 1M context window. Anthropic says it costs up to 30% less for most work and is now the default Sonnet model on the API.

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  1. Sep 28
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