by Anthropic
Opus 4.1 is an upgraded version of Claude Opus 4, with improvements mainly in agent tasks, practical coding, and reasoning. Compared to Opus 4, there is a slight improvement in software engineering accuracy; Opus 4.1 has higher accuracy at 74.5%.
Opus 4.1 is an upgraded version of Claude Opus 4, with improvements mainly in agent tasks, practical coding, and reasoning. Compared to Opus 4, there is a slight improvement in software engineering accuracy; Opus 4.1 has higher accuracy at 74.5%.
claude-opus-4-1 has a 200,000 token context window.
On AIHubMix, claude-opus-4-1 costs $16.5 per million input tokens and $82.5 per million output tokens.
claude-opus-4-1 accepts text and image input.
claude-opus-4-1 supports thinking, tool calling, function calling and structured outputs. Per-protocol parameter support is listed in the capability table on this page.
claude-opus-4-1 is available through the AIHubMix unified API. The API is OpenAI-compatible: point your OpenAI SDK at https://aihubmix.com/v1, use your AIHubMix API key, and set the model name to claude-opus-4-1 — no other code changes needed.
claude-opus-4-1 is developed by Anthropic. AIHubMix aggregates it alongside models from other providers behind one API and one bill.
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Use claude-opus-4-1 via the AIHubMix unified API — one interface for every major LLM.