~anthropic/claude-opus-latest
This model always redirects to the latest model in the Claude Opus family.
This model always redirects to the latest model in the Claude Opus 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 Opus Latest on OpenRouter.
This model always redirects to the latest model in the Claude Opus family.
The Claude Opus Latest documentation on OpenRouter includes the Claude Opus 5.5 Migration Guide cookbook. The quickstart covers API keys and your first request, and the API reference lists every parameter.
Claude Opus Latest costs $4.00/M input tokens and $20.00/M output tokens, with separate rates for Cache Read at $0.20/M tokens, Cache Write at $5.00/M tokens, and Cache Write (1h) at $8.00/M tokens.
Claude Opus Latest has a 1,000,000 token context window. It supports up to 128,000 completion tokens.
Yes. Claude Opus Latest accepts tools and tool_choice for function calling. It also supports structured outputs via a JSON schema in response_format.
Claude Opus Latest accepts text, images, and files such as PDFs as input and returns text.
Claude Sonnet 5.5, Claude Fable 5.1, Claude Opus 5 and 11 more are other text models from Anthropic.
Claude Opus Latest was released on April 21, 2026.