~anthropic/claude-sonnet-latest
This model always redirects to the latest model in the Claude Sonnet family.
This model always redirects to the latest model in the Claude Sonnet family.
Drop-in code to call this model. OpenRouter's API is OpenAI-compatible — most SDKs work by just swapping the base URL. The only thing that changes between models is the model slug below.
Guides, cookbooks, and tools for building with Anthropic: Claude Sonnet Latest on OpenRouter.
This model always redirects to the latest model in the Claude Sonnet family.
The Claude Sonnet Latest documentation on OpenRouter includes the Claude 5 Sonnet Migration Guide cookbook. The quickstart covers API keys and your first request, and the API reference lists every parameter.
Claude Sonnet Latest costs $2.00/M input tokens and $10.00/M output tokens, with separate rates for Cache Read at $0.20/M tokens, Cache Write at $2.50/M tokens, and Cache Write (1h) at $4.00/M tokens.
Claude Sonnet Latest has a 1,000,000 token context window. It supports up to 128,000 completion tokens.
Yes. Claude Sonnet Latest accepts tools and tool_choice for function calling. It also supports structured outputs via a JSON schema in response_format.
Claude Sonnet Latest accepts text, images, and files such as PDFs as input and returns text.
Claude Opus 5.5, Claude Fable 5.1, Claude Opus 5 and 11 more are other text models from Anthropic.
Claude Sonnet Latest was released on April 27, 2026.