LLMs

Large language model integrations - Access top AI models through one unified API.

Access the world's best large language models through one unified API. Chat completions, text generation, embeddings, and more with OpenAI, Anthropic, Google, and other providers.

Try It Now

API Reference

Start using LLMs with chat completions and embeddings

Authentication

Include your API key in all requests:

Authorization: Bearer sk_case_your_api_key_here

Quick Start

curl -X POST https://api.case.dev/llm/v1/chat/completions \
  -H "Authorization: Bearer sk_case_your_api_key_here" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "anthropic/claude-sonnet-4.5",
    "messages": [
      {
        "role": "user",
        "content": "Explain hearsay in legal terms"
      }
    ]
  }'

What's Next?

Examples
Real-world LLM usage examples
Model Selection
Choosing the right model for your use case