GPT Image 2 - Upmore

GPT Image 2 is OpenAI’s next-generation image generation model, available through Upmore API. Built on an autoregressive + reasoning hybrid architecture, it delivers native 2K resolution, near-perfect text rendering (~99% character-level accuracy across 12+ languages), and superior multi-object scene composition.

Key capabilities

Text-to-Image — Generate images from natural language descriptions
Flexible resolution — Any custom size up to 4K (3840px), edges must be multiples of 16
Near-perfect text rendering — ~99% character-level accuracy across 12+ languages
Multi-object composition — Complex scenes without occlusion or misplacement issues
Multi-style — Photorealism, illustration, anime, vector, 3D, data visualization
Batch generation — Generate up to 4 images per request

Output specifications

Property	Value
Sizes	Flexible resolution (e.g. 1024x1024, 2048x2048, 3840x2160)
Size constraints	Edges: multiples of 16, aspect ratio ≤ 3:1, total pixels 655,360–8,294,400
Quality	low, medium, high
Formats	png, webp, jpeg

Quick example

curl https://api.upmore.net/v1/images/generations \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-image-2",
    "prompt": "A futuristic city skyline at sunset with flying cars",
    "size": "2048x2048",
    "quality": "high"
  }'

from openai import OpenAI

client = OpenAI(
    api_key="YOUR_API_KEY",
    base_url="https://api.upmore.net/v1"
)

response = client.images.generate(
    model="gpt-image-2",
    prompt="A futuristic city skyline at sunset with flying cars",
    size="2048x2048",
    quality="high"
)

print(response.data[0].b64_json[:100])

Parameters

Parameter	Type	Required	Description
`model`	string	Yes	Must be `gpt-image-2`
`prompt`	string	Yes	Text description of the desired image
`n`	integer	No	Number of images to generate (1–4). Default: `1`
`size`	string	No	`{width}x{height}` format. Edges must be multiples of 16, aspect ratio ≤ 3:1, total pixels 655,360–8,294,400, max edge 3,840px. Default: `1024x1024`
`quality`	string	No	`low`, `medium`, `high`. Default: `medium`
`output_format`	string	No	`png`, `webp`, `jpeg`. Default: `png`
`moderation`	string	No	`auto` or `low`. Default: `auto`
`output_compression`	integer	No	Compression level for jpeg/webp (0–100).

API Reference

View the interactive API playground.