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Try Claude Sonnet 4.5 in the Workbench

Run this model interactively, tune parameters, and compare outputs.
Model ID: claude-sonnet-4-5 Anthropic’s most advanced AI model, excelling in coding, agent-based tasks, and computer usage. It delivers high performance in reasoning, math, and domain-specific knowledge across fields like finance, law, and STEM.

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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-sonnet-4-5",
  "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-sonnet-4-5

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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.