生成图像（OpenAI 兼容）
计费单位取决于模型 —— 按张还是按 token，以模型目录页标注为准。无论哪种，一次请求多张图时每张各计一次。主上游不可用时本次请求可能由备用模型应答，响应头会写明实际应答的是哪个模型。
Authorization
bearerAuth Authorization: Bearer <your RouteMux API key>.
Create keys at https://routemux.com/console/keys. New keys use the sk- prefix;
the legacy rmx_live_ prefix is still accepted.
The Anthropic SDK's x-api-key and the Google SDK's x-goog-api-key are accepted too.
Sending several key headers with different values returns 400 AUTH_AMBIGUOUS_API_KEY.
In: header
Request Body
application/json
TypeScript Definitions
Use the request body type in TypeScript.
Request and response bodies match the upstream provider's official format verbatim —
RouteMux passes them through untouched. See the provider's own docs for field definitions;
the gateway itself only reads model and stream.
Response Body
application/json
application/json
application/json
curl -X POST "https://example.com/v1/images/generations" \ -H "Content-Type: application/json" \ -d '{ "model": "openai/gpt-image-2.5-flare", "prompt": "A neon city at dusk" }'{ "model": "string", "stream": true}