Claude Sonnet 5.5
by Anthropic
Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade. It is especially strong at building features, fix
Models
Claude Sonnet 5.5
Added 29 Sept 2026
Overview
Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade. It is especially strong at building features, fixing bugs, and producing...
How to use / API access
Call via OpenRouter with model id `anthropic/claude-sonnet-5.5`.
- openrouter ·
anthropic/claude-sonnet-5.5Docs
OpenRouter id: anthropic/claude-sonnet-5.5
Benchmarks
- Intelligence Index (artificial-analysis) : 56 index
Notes
Claude Sonnet 5.5 is listed in the EDNA Models directory from the OpenRouter catalogue.
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