Image generation

Make pictures from a prompt with OpenAI’s Images API: Nano Banana and GPT Image, one call each.

Make an image

import os
from openai import OpenAI
client = OpenAI(base_url="https://api.zurelay.com/v1", api_key=os.environ["ZURELAY_API_KEY"])
result = client.images.generate(
    model="nano-banana-pro",
    prompt="A red fox curled up asleep in fresh snow at dawn, soft golden light, 85mm photo",
    size="2K",
    extra_body={
      "aspect_ratio": "3:2"
    },
)
print(result.data[0].url)

{
  "created": 1790870400,
  "data": [
    { "url": "https://...signed link, valid for 24 hours..." }
  ]
}

Parameters

Sizes

Nano Banana is priced by resolution and makes exactly the size asked for: an image that comes back smaller is retried, never delivered. At 1K:

GPT Image costs the same at every size: 1024x1024, 1536x1024, 1024x1536, 2048x2048, 3840x2160, 2160x3840.

Links and history

• Links in url are signed and work for 24 hours. Download what you want to keep.
• Images returned as url are also kept for 30 days in your dashboard’s image history, where you can download them again. Images returned as b64_json aren’t stored.
• Prompts sent through the API aren’t stored with the images.

Timing

Most images arrive in 10 to 60 seconds, longer at 4K. If an attempt stalls, the request is retried on another path automatically, so give your client a timeout of 10 minutes.

When an image isn’t made

If the model declines a prompt (say, for its content policy), you get 400 image_not_generated with the model’s reason, and you’re not charged. With n above 1, you get the images that were made and pay only for those.