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Anthropic: Claude Opus Latest

Claude Opus 5

~anthropic/claude-opus-latest

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This model always redirects to the latest model in the Claude Opus family.

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Quick Start

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.

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About Anthropic: Claude Opus Latest

OpenRouter makes Anthropic: Claude Opus Latest available through a unified, OpenAI-compatible API using the model ID ~anthropic/claude-opus-latest.

Anthropic: Claude Opus Latest accepts text, images and files such as PDFs and returns text. It has a 1,000,000-token context window and a maximum output of 128,000 tokens.

On OpenRouter, Anthropic: Claude Opus Latest costs $5.00/M input tokens and $25.00/M output tokens, with separate rates for Cache Read at $0.50/M tokens, Cache Write at $6.25/M tokens, Cache Write (1h) at $10.00/M tokens and Web Search at $10.00/1K calls. Effective pricing can be lower when prompt caching applies. It was released on April 21, 2026.

More models from Anthropic

  • Claude Opus 5 (Fast)
  • Claude Sonnet 5
  • Claude Fable 5

Frequently asked questions

This model always redirects to the latest model in the Claude Opus family.

Claude Opus Latest costs $5.00/M input tokens and $25.00/M output tokens, with separate rates for Cache Read at $0.50/M tokens, Cache Write at $6.25/M tokens, Cache Write (1h) at $10.00/M tokens and Web Search at $10.00/1K calls.

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 Opus 5 (Fast), Claude Sonnet 5, Claude Fable 5 and 13 more are other text models from Anthropic.

Claude Opus Latest was released on April 21, 2026.