AI model · Anthropic
Claude Sonnet 5.5
Model ID: anthropic/claude-sonnet-5.5
- Input
- $2 per 1M tokens
- Output
- $10 per 1M tokens
- Context
- 1M tokens at once
- Max output
- 128K tokens per reply
- Released
- 28 Sep 2026 Anthropic
What it can do
- YesReasoning
- YesTool calling
- YesImage input
- NoOpen weights
- NoFree to use
Takes text, image, file; gives text.
How its listing describes it
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...
Sources
- Anthropic: Claude Sonnet 5.5 on OpenRouter — read 2 Oct 2026