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Try Claude Opus 4.1 in the Workbench

Run this model interactively, tune parameters, and compare outputs.
Model ID: claude-opus-4-1-20250805 Claude Opus 4.1 is a Multimodal LLM. It excels in complex coding, autonomous multi-step reasoning, and agentic workflows, offering reliable performance on tasks that require sustained focus, detailed analysis, and the ability to process very large contexts. Some other noteworthy use cases and features of Claude Opus 4.1 include:
  • Advanced document and codebase analysis, enabled by its 200,000-token context window, allowing comprehensive review or synthesis of lengthy materials.
  • High proficiency in agentic search and research tasks, supporting agents that autonomously conduct research, orchestrate workflows, or generate strategic insights from large, diverse data sources.
MetricValue
Parameter CountUnknown
Mixture of ExpertsUnknown
Context Length200,000 tokens
MultilingualYes
Quantized*Unknown
*Quantization is specific to the inference provider and the model may be offered with different quantization levels by other providers.

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Example request

Use the Workbench as a request builder: configure parameters for this model in the UI, then open the API tab to copy the exact cURL or Python call.
curl -X POST https://hub.oxen.ai/api/ai/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $OXEN_API_KEY" \
  -d '{
  "model": "claude-opus-4-1-20250805",
  "messages": [
    {
      "role": "user",
      "content": "Hello, what can you do?"
    }
  ]
}'

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Fetch model details

The models endpoint returns the full model object, including its json_request_schema. 
curl -H "Authorization: Bearer $OXEN_API_KEY" https://hub.oxen.ai/api/ai/models/claude-opus-4-1-20250805

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Request parameters

This model follows the standard OpenAI chat completions request body. See the chat completions reference for the full parameter list.