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Anthropic · Language model
Claude Opus 4.1
anthropic/claude-opus-4.1- Language
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...
Specifications
- Context window
- 200,000 tokens
- Max output
- 32,000 tokens
- Input
- image, text, file
- Output
- text
- Reasoning
- supported
- Tokenizer
- Claude
- Knowledge cutoff
- 2025-01-31
- Moderation
- provider-moderated
Supported parameters
Accepted by the model and forwarded as-is by the gateway.
- max_tokens
- reasoning
- stop
- temperature
- tool_choice
- tools
- top_k
- top_p
Use it
POST /api/v1/chat/completions · MCP chat · full reference
curl https://omnirail.org/api/v1/chat/completions \
-H "Authorization: Bearer $OMNIRAIL_KEY" -H "Content-Type: application/json" \
-d '{"model":"anthropic/claude-opus-4.1","messages":[{"role":"user","content":"Hello"}],"max_tokens":300}'