How do you use Claude Opus 4.1?

Claude Opus 4.1 can be called through OpenRouter's OpenAI-compatible API using the model ID anthropic/claude-opus-4.1. This page includes a ready-to-run curl example and the supported parameter list.

Is Claude Opus 4.1 free?

Claude Opus 4.1 is a paid model in the OpenRouter catalog, with separate input and output token pricing shown on this page.

Claude Opus 4.1

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AnthropicClaude

Claude Opus 4.1

Q: What is Claude Opus 4.1?

Claude Opus 4.1 is an AI model from Anthropic in the Claude series. Agent Mag tracks its context window, pricing, modalities, and supported API parameters on this page.

200K context

$15.00/M input

$75.00/M output

Claude Opus 4.1 is an AI model from Anthropic built for agent workflows, with support for image, text, file input and text output. Claude Opus 4.1 is an updated version of Anthropic’s flagship model, offering improved performance in coding, reasoning, and agentic tasks. It achieves 74.5% on SWE-bench Verified and shows notable gains...

What is Claude Opus 4.1?

Claude Opus 4.1 is an AI model from Anthropic that Agent Mag tracks for pricing, context window, modalities, benchmarks, and API compatibility. Builders can use this page to compare Claude Opus 4.1 against other models for agent workflows and production deployments.

Model ID

Claude Opus 4.1 is an updated version of Anthropic’s flagship model, offering improved performance in coding, reasoning, and agentic tasks. It achieves 74.5% on SWE-bench Verified and shows notable gains...

Modalities

Input

imagetextfile

Output

text

Supported Parameters

include_reasoningmax_tokensreasoningresponse_formatstopstructured_outputstemperaturetool_choicetoolstop_ktop_p

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Claude Opus 4.1

What is Claude Opus 4.1?

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