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OpenAI image generation API

GPT API

GPT API gives teams a GPT image generation option with practical prompt reasoning, strong instruction following, and a clean async API workflow.

Model slug
gpt-medium
Credit rate
3 credits
Provider
OpenAI
GPT API image generation sample

Model overview

What is GPT API?

GPT image API option for practical generation, prompt reasoning, and everyday product visuals.

Use GPT through LumixAI when you want one stable REST workflow for prompts, model selection, async jobs, usage tracking, and credit pricing. The page targets searches for GPT API, GPT image API, and OpenAI image generation API.

prompt reasoning

app images

creative drafts

Developer workflow

Call GPT from one image API.

Async jobs

Queue generation, poll status, and return image URLs when render completes.

Credit pricing

GPT starts at 3 credits per image before conditional rules.

await fetch("https://api.example.com/v1/images/jobs", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    "X-API-Key": process.env.LUMIXAI_API_KEY
  },
  body: JSON.stringify({
    model: "gpt-medium",
    prompt: "premium product image, clean studio lighting",
    aspectRatio: "16:9",
    resolution: "2k"
  })
});

Next step

Try GPT with an API key.

Start generating
GPT API | LumixAI