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The OpenAI-compatible surface covers Chat Completions, Responses, and all related endpoints. It’s the path that OpenAI / DeepSeek / xAI Grok / Alibaba Qwen / Moonshot Kimi / MiniMax models use, and it also serves Anthropic and Gemini models via translation.

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/v1/chat/completions

curl https://api.orcarouter.ai/v1/chat/completions \
  -H "Authorization: Bearer sk-orca-..." \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai/gpt-4o-mini",
    "messages": [{"role": "user", "content": "Hello"}]
  }'

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/v1/responses

curl https://api.orcarouter.ai/v1/responses \
  -H "Authorization: Bearer sk-orca-..." \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai/gpt-5",
    "input": "Hello"
  }'
OpenAI models and xAI Grok models are supported here — xAI’s Agent Tools API uses the same shape. Anthropic and Gemini models return not_implemented because their native shapes differ; call /v1/messages or /v1beta/.../generateContent for those.

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See also