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Gemini-Compatible OpenAI Model List

GET /v1beta/openai/models
This endpoint is a compatibility bridge:
  • the auth style can be Gemini-like
  • the response shape is still OpenAI-style model-list JSON
This page only documents behavior that was revalidated against Crazyrouter production on 2026-03-23.

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When to use it

  • your client prefers ?key=
  • your middleware already uses x-goog-api-key
  • you want an OpenAI-style list + data[] response rather than native Gemini model metadata
If you are using a normal OpenAI-compatible client, prefer GET /v1/models.

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Authentication

This recheck confirmed that all three of the following work: 
Authorization: Bearer YOUR_API_KEY

x-goog-api-key: YOUR_API_KEY

GET /v1beta/openai/models?key=YOUR_API_KEY

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Request examples

curl "https://crazyrouter.com/v1beta/openai/models?key=YOUR_API_KEY"

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Current production findings

In the 2026-03-23 production recheck:
  • the ?key= request returned 200
  • the x-goog-api-key request returned 200
  • the top-level object was list
  • the top-level success was true
  • the current model count was 541
  • common fields inside data[] included:
    • id
    • object
    • created
    • owned_by
    • supported_endpoint_types

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Response example

{
  "object": "list",
  "success": true,
  "data": [
    {
      "id": "gpt-5.4",
      "object": "model",
      "created": 1700000000,
      "owned_by": "openai",
      "supported_endpoint_types": ["openai"]
    },
    {
      "id": "claude-sonnet-4-6",
      "object": "model",
      "created": 1700000000,
      "owned_by": "anthropic",
      "supported_endpoint_types": ["openai", "anthropic"]
    },
    {
      "id": "gemini-3-pro-preview",
      "object": "model",
      "created": 1700000000,
      "owned_by": "google",
      "supported_endpoint_types": ["openai", "gemini"]
    }
  ]
}

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Field notes

FieldTypeMeaning
data[]arrayModels available to the current token
idstringModel identifier
owned_bystringUpstream source or owner label
supported_endpoint_typesarraySupported API styles for the model
objectstringAlways list
successbooleanWhether the request succeeded
Read the path meaning of supported_endpoint_types from supported_endpoint in GET /api/pricing. At the moment, openai maps to POST /v1/chat/completions, anthropic maps to POST /v1/messages, and only openai-response maps to POST /v1/responses. Claude currently exposes openai + anthropic, not openai-response.
This endpoint does not return only Gemini models. It returns the OpenAI-style model list visible to the current token, but exposes it through a Gemini-friendly access path.