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

Imagen 3 Fast vs Stable Diffusion 3.5 Large

Newest: Stable Diffusion 3.5 Large · Image editing: Neither edits images · Self-hosting: Stable Diffusion 3.5 Large. Not enough arena votes yet for a quality score, so this is a spec comparison.

  1. Google

    Imagen 3 Fast

    Released Oct 17, 2024

    • Text to image
    • Arena—
    • From$0.02/image
    • Max size—
    Full specs Remove Imagen 3 Fast

  2. Stability AI

    Stable Diffusion 3.5 Large

    Released Oct 22, 2024

    • Text to image
    • Arena938
    • From—
    • Max size—
    Full specs Remove Stable Diffusion 3.5 Large

  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.

  • NewestStable Diffusion 3.5 LargeImagen 3 Fast Oct 17, 2024 · Stable Diffusion 3.5 Large Oct 22, 2024
  • Widest inputsSame inputsImagen 3 Fast: Text prompts · Stable Diffusion 3.5 Large: Text prompts
  • Image editingNeither edits imagesTakes a reference image as input: Imagen 3 Fast no · Stable Diffusion 3.5 Large no
  • Self-hostingStable Diffusion 3.5 LargeDownloadable weights
  • Most API hostsSame reachImagen 3 Fast: 1 · Stable Diffusion 3.5 Large: 1
02 — Side by side

Every spec in one table

Dashes mean the data is not published.

Imagen 3 Fast vs Stable Diffusion 3.5 Large specifications side by side
SpecificationImagen 3 FastGoogleStable Diffusion 3.5 LargeStability AI
Quality (blind human votes)
Text to image arenaElo-style score · higher is better—938 ±4#81 of 82 · 23,396 votes
Price
Starting price$0.02/image standard—
How it is billedPer image—
Output
ProducesImagesImages
Inputs
Text promptsYesYes
Reference images (editing)NoNo
Access
WeightsProprietaryOpen
API hosts11
ReleasedOct 17, 2024Oct 22, 2024
03 — Questions

Which should you choose?

Which is better, Imagen 3 Fast or Stable Diffusion 3.5 Large?

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 3 Fast costs from $0.02/image (standard). Stable Diffusion 3.5 Large has no published per-image price. Prices are list rates and change often; check the lab before budgeting.

What is the difference between Imagen 3 Fast and Stable Diffusion 3.5 Large?

Imagen 3 Fast is an image model from Google (Oct 17, 2024), taking text prompts and producing images. Stable Diffusion 3.5 Large is an image model from Stability AI (Oct 22, 2024), taking text prompts and producing images.

Which is newer?

Imagen 3 Fast Oct 17, 2024; Stable Diffusion 3.5 Large Oct 22, 2024.

Which can edit an existing image?

Takes a reference image as input: Imagen 3 Fast no; Stable Diffusion 3.5 Large no.

Can I run any of these on my own hardware?

Stable Diffusion 3.5 Large. Downloadable weights.

04 — Keep comparing

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