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GPT Image 1.5

GPT Image 1 & 1.5 — OpenAI Image Generator Guide

  • OpenAI GPT Image 1 (`gpt-image-1-official`) and 1.5 (`gpt-image-1.5-official`) on APIMart.
  • Text-to-image, image-to-image, inpainting, transparent backgrounds, and quality tiers.
  • Educational overview on FreeMake.cc — compare with GPT Image 2 before you choose an engine.
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What are GPT Image 1 and 1.5?GPT Image 1.x use casesHow GPT Image 1.x worksGPT Image 1.5 vs GPT Image 2 & othersGPT Image 1.x FAQ

What are GPT Image 1 and 1.5?

Before GPT Image 2, OpenAI’s image line on APIMart included GPT Image 1 (stability-first) and GPT Image 1.5 (higher quality and editing). Both support up to four outputs per request, fifteen reference images, PNG/JPEG/WebP, and optional transparent backgrounds — still relevant for teams standardized on the 1.x API surface.

Text in images

1.5 especially strong for headlines, labels, and layout-heavy marketing.

Inpainting

Mask-based edits alongside text-to-image and image-to-image.

Transparent PNG

Background=transparent pairs with PNG for UI and e-commerce cutouts.

15 references

Multi-reference fusion for complex composite edits.

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GPT Image 1.x use cases

When you need OpenAI 1.x compatibility or proven text rendering.

  • Ads & posters

    Readable on-image copy for social and display campaigns.

  • Product composites

    Cutout-friendly transparent outputs for storefronts.

  • Slide & doc visuals

    Diagrams and cover art with embedded English text.

  • API migration

    Teams comparing 1.5 vs GPT Image 2 before switching endpoints.

How GPT Image 1.x works

APIMart async OpenAI-compatible image API.

  1. Pick 1 or 1.5

    1 for stability; 1.5 for higher quality and harder edits.

  2. Set quality & format

    Quality tiers affect billing; choose PNG for transparency.

  3. Add references or mask

    Use image_urls for fusion; mask for inpainting regions.

  4. Try on FreeMake.cc

    Explore GPT Image 2 or other models in our generator when ready.

GPT Image 1.5 vs GPT Image 2 & others

Newer is not always required — match API generation to your workflow.

ModelBest for
GPT Image 1.5 (this page)
1.x official channel, inpainting, 15 refs, transparent PNG.
GPT Image 2
Latest OpenAI image model with 4K and broader aspect ratios.
Gemini 3.1 Flash
Fast 4K multimodal alternative with search grounding.
Qwen Image 2.0
Chinese prompts and hanzi inside images.
Models hubSee pricing & credits

GPT Image 1.x FAQ

OpenAI GPT Image 1 / 1.5 on APIMart.

  1. GPT Image 1 vs 1.5?

    1.5 improves quality and complex image-to-image; 1 is stability-first for general generation.

  2. vs GPT Image 2?

    Image 2 adds newer realism, 4K tiers, and expanded size controls — migrate when your pipeline needs them.

  3. Inpainting support?

    Yes — provide mask and reference per APIMart GPT Image 1 API docs.

  4. How many images per call?

    Up to 4 images per request; up to 15 reference URLs.

  5. Transparent background?

    Set background=transparent and output_format=png for cutouts.

  6. On FreeMake.cc?

    Generator may list GPT Image 2 first; this page documents 1.x for research and comparison.

  7. Need ChatGPT Plus?

    No — APIMart access via FreeMake.cc does not require a ChatGPT subscription.

  8. Commercial use?

    Review Terms of Service and OpenAI/APIMart usage policies.

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GPT Image 1 & 1.5 Free — OpenAI Image Generator Guide