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Access 195+ AI models from leading providers through a single API. All models support the OpenAI-compatible chat completions format.

Browse Models

Visual Model Catalog — Search, filter, and compare all 195+ models with real-time pricing, context windows, and capabilities.

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Using a Model

To use any model, pass its ID to the chat completions endpoint: 
curl https://api.case.dev/llm/v1/chat/completions \
  -H "Authorization: Bearer sk_case_YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "anthropic/claude-sonnet-4.5",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

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Programmatic Access

Get the complete model list via API: 
curl https://api.case.dev/llm/v1/models \
  -H "Authorization: Bearer sk_case_YOUR_API_KEY"
Response includes all models with current pricing, context windows, and capabilities.