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GPT Image 1.5 is OpenAI’s latest image generation model based on the GPT-5 architecture, available through the Starrise AI API. It’s 4× faster and 20% cheaper than GPT Image 1, with significantly improved text rendering and editing precision.

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Key Capabilities

  • Text-to-image — Generate images from natural language descriptions
  • Image editing — Precisely edit existing images
  • Enhanced text — Dense text, small fonts, infographics, and UI mockups
  • World knowledge — Context-aware with built-in reasoning capabilities
  • Transparent background — Supports generating images with transparent backgrounds
  • Batch generation — Generate up to 4 images per request

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Output Specs

PropertyValues
Size1024x1024, 1536x1024, 1024x1536, auto
Qualitylow, medium, high
Formatpng, webp, jpeg
Backgroundtransparent, opaque

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Quick Example

curl https://ai.alad.com/v1/images/generations \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-image-1.5",
    "prompt": "A cute cat floating in the Milky Way wearing a spacesuit",
    "size": "1024x1024",
    "quality": "high"
  }'

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Parameters

ParameterTypeRequiredDescription
modelstringYesMust be gpt-image-1.5
promptstringYesImage description text
nintegerNoNumber of images to generate (1–4), default 1
sizestringNo1024x1024, 1536x1024, 1024x1536, auto, default auto
qualitystringNolow, medium, high, default medium
output_formatstringNopng, webp, jpeg, default png
backgroundstringNotransparent or opaque, default opaque
moderationstringNoauto or low, default auto
output_compressionintegerNoCompression level for jpeg/webp format (0–100)

API Reference

View the interactive API Playground for GPT Image 1.5.