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

Imagen 4 Ultra vs FLUX.1 Kontext Max

Preferred for text to image: Imagen 4 Ultra · Newest: FLUX.1 Kontext Max · Widest inputs: FLUX.1 Kontext Max. Quality scores are blind human-preference votes; specs and prices come from each lab’s listings.

  1. Google

    Imagen 4 Ultra

    Released May 24, 2025

    • Text to image
    • Arena1,146
    • From$0.06/image
    • Max size—
    Full specs Remove Imagen 4 Ultra

  2. Black Forest Labs

    FLUX.1 Kontext Max

    Released May 29, 2025

    • Text to image
    • Image editing
    • Arena1,182
    • From—
    • Max size—
    Full specs Remove FLUX.1 Kontext Max

  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.

  • Preferred for text to imageImagen 4 UltraImagen 4 Ultra 1,146 (#37) · FLUX.1 Kontext Max 1,075 (#61) — blind human votes
  • NewestFLUX.1 Kontext MaxImagen 4 Ultra May 24, 2025 · FLUX.1 Kontext Max May 29, 2025
  • Widest inputsFLUX.1 Kontext MaxImagen 4 Ultra: Text prompts · FLUX.1 Kontext Max: Text prompts, Reference images
  • Image editingFLUX.1 Kontext MaxTakes a reference image as input: Imagen 4 Ultra no · FLUX.1 Kontext Max yes
  • Self-hostingNo open weightsBoth are available only through APIs and apps
  • Most API hostsSame reachImagen 4 Ultra: 1 · FLUX.1 Kontext Max: 1
02 — Side by side

Every spec in one table

Dashes mean the data is not published.

Imagen 4 Ultra vs FLUX.1 Kontext Max specifications side by side
SpecificationImagen 4 UltraGoogleFLUX.1 Kontext MaxBlack Forest Labs
Quality (blind human votes)
Text to image arenaElo-style score · higher is better1,146 ±4#37 of 82 · 388,723 votes (best)1,075 ±3#61 of 82 · 65,501 votes
Image editing arenaElo-style score · higher is better—1,182 ±3#52 of 61 · 390,855 votes
Price
Starting price$0.06/image standard—
How it is billedPer image—
Output
ProducesImagesImages
Inputs
Text promptsYesYes
Reference images (editing)NoYes
Access
WeightsProprietaryProprietary
API hosts11
ReleasedMay 24, 2025May 29, 2025
03 — Questions

Which should you choose?

Which is better, Imagen 4 Ultra or FLUX.1 Kontext Max?

For text to image, voters prefer Imagen 4 Ultra (Imagen 4 Ultra 1,146 (#37) · FLUX.1 Kontext Max 1,075 (#61)). Arena scores come from blind, side-by-side human votes on the same prompts; when the gap is inside both models’ error margins we call it a tie. Test your own prompts before you commit.

Which is cheaper?

Imagen 4 Ultra costs from $0.06/image (standard). FLUX.1 Kontext Max 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 Ultra and FLUX.1 Kontext Max?

Imagen 4 Ultra is an image model from Google (May 24, 2025), taking text prompts and producing images. FLUX.1 Kontext Max is an image model from Black Forest Labs (May 29, 2025), taking text prompts and reference images and producing images.

Which is newer?

Imagen 4 Ultra May 24, 2025; FLUX.1 Kontext Max May 29, 2025.

Which can edit an existing image?

Takes a reference image as input: Imagen 4 Ultra no; FLUX.1 Kontext Max 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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