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更新日: 2026-06-06

Create Completion (Legacy)

This is a compatibility endpoint, not the primary recommended path. For new integrations, prefer /v1/chat/completions or /v1/responses.

Current Production Status

As of March 23, 2026, Crazyrouter production confirms:
  • the route still exists
  • a request using the classic example model gpt-4.1-mini returned 503
  • the error code was model_not_found
  • the message said the model was temporarily unavailable
In practice, this means the endpoint should be treated as legacy-client compatibility only, not as the default path for new work.

Current Recommendation

  1. Use Chat Completions for new chat-style integrations
  2. Use Responses when you need GPT-5 reasoning, web search, or newer response shapes
  3. Only keep testing /v1/completions if you already depend on a legacy client and have confirmed that your legacy model is currently available

Retest Template

If you must verify whether a legacy model still works on this endpoint, first confirm the model ID through /v1/models, then send a minimal request:
Observed production error example: