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Image model comparison · 2 models · Updated Nov 2, 2026

Imagen 4 Fast vs GPT Image 1

Newest: Imagen 4 Fast · Widest inputs: GPT Image 1 · Image editing: GPT Image 1. Not enough arena votes yet for a quality score, so this is a spec comparison.

  1. Google

    Imagen 4 Fast

    Released Jun 25, 2025

    • Text to image
    • Arena—
    • From$0.02/image
    • Max size—
    Full specs Remove Imagen 4 Fast

  2. OpenAI

    GPT Image 1

    Released Apr 24, 2025

    • Text to image
    • Image editing
    • Arena1,139
    • From—
    • Max size—
    Full specs Remove GPT Image 1

  3. Add a model

    Make it a three-way comparison.

01 — At a glance

Where they differ

Quality is the arena score from blind, side-by-side human votes. Price, length and resolution come from each lab’s own listings.

  • NewestImagen 4 FastImagen 4 Fast Jun 25, 2025 · GPT Image 1 Apr 24, 2025
  • Widest inputsGPT Image 1Imagen 4 Fast: Text prompts · GPT Image 1: Text prompts, Reference images
  • Image editingGPT Image 1Takes a reference image as input: Imagen 4 Fast no · GPT Image 1 yes
  • Self-hostingNo open weightsBoth are available only through APIs and apps
  • Most API hostsGPT Image 1Imagen 4 Fast: 1 · GPT Image 1: 4
02 — Side by side

Every spec in one table

Dashes mean the data is not published.

Imagen 4 Fast vs GPT Image 1 specifications side by side
SpecificationImagen 4 FastGoogleGPT Image 1OpenAI
Quality (blind human votes)
Text to image arenaElo-style score · higher is better—1,115 ±3#49 of 82 · 268,430 votes
Image editing arenaElo-style score · higher is better—1,139 ±3#57 of 61 · 2,869,681 votes
Price
Starting price$0.02/image standard—
How it is billedPer image—
Output
ProducesImagesImages
Inputs
Text promptsYesYes
Reference images (editing)NoYes
Access
WeightsProprietaryProprietary
API hosts14 (best)
ReleasedJun 25, 2025Apr 24, 2025
03 — Questions

Which should you choose?

Which is better, Imagen 4 Fast or GPT Image 1?

Neither model has enough arena votes for a reliable quality score yet, so this page compares specs only. Run the same three or four prompts through each and judge the results.

Which is cheaper?

Imagen 4 Fast costs from $0.02/image (standard). GPT Image 1 has no published per-image price. Prices are list rates and change often; check the lab before budgeting.

What is the difference between Imagen 4 Fast and GPT Image 1?

Imagen 4 Fast is an image model from Google (Jun 25, 2025), taking text prompts and producing images. GPT Image 1 is an image model from OpenAI (Apr 24, 2025), taking text prompts and reference images and producing images.

Which is newer?

Imagen 4 Fast Jun 25, 2025; GPT Image 1 Apr 24, 2025.

Which can edit an existing image?

Takes a reference image as input: Imagen 4 Fast no; GPT Image 1 yes.

Can I run any of these on my own hardware?

No open weights. Both are available only through APIs and apps.

04 — Keep comparing

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