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POST
Claude Messages Compatible Endpoint
No Claude model is live on FreeModel yet. Until one launches, POST /v1/messages returns 404 model_not_available for every model ID.
POST /v1/messages is FreeModel’s Anthropic Messages endpoint. It serves Claude model IDs only; FreeModel does not translate Messages requests to GPT, Gemini, Grok, or DeepSeek models. Check the Claude model page for launch status.

Endpoint

Anthropic-compatible clients use the base URL https://api.freemodel.app (no /v1 suffix; the client appends /v1/messages).

Authentication and headers

Request body