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

Seedream 4.0 vs FLUX.2 [pro]

Preferred for text to image: FLUX.2 [pro] · Preferred for image editing: Seedream 4.0 · Newest: FLUX.2 [pro]. Quality scores are blind human-preference votes; specs and prices come from each lab’s listings.

  1. ByteDance Seed

    Seedream 4.0

    Released Sep 9, 2025

    • Text to image
    • Image editing
    • Arena1,267
    • From—
    • Max size—
    Full specs Remove Seedream 4.0

  2. Black Forest Labs

    FLUX.2 [pro]

    Released Nov 25, 2025

    • Text to image
    • Image editing
    • Arena1,247
    • From$0.03/image
    • Max size—
    Full specs Remove FLUX.2 [pro]

  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 imageFLUX.2 [pro]Seedream 4.0 1,139 (#40) · FLUX.2 [pro] 1,153 (#32) — blind human votes
  • Preferred for image editingSeedream 4.0Seedream 4.0 1,267 (#34) · FLUX.2 [pro] 1,247 (#38) — blind human votes
  • NewestFLUX.2 [pro]Seedream 4.0 Sep 9, 2025 · FLUX.2 [pro] Nov 25, 2025
  • Widest inputsSame inputsSeedream 4.0: Text prompts, Reference images · FLUX.2 [pro]: Text prompts, Reference images
  • Image editingBoth edit imagesTakes a reference image as input: Seedream 4.0 yes · FLUX.2 [pro] yes
  • Self-hostingNo open weightsBoth are available only through APIs and apps
  • Most API hostsSame reachSeedream 4.0: 1 · FLUX.2 [pro]: 1
02 — Side by side

Every spec in one table

Dashes mean the data is not published.

Seedream 4.0 vs FLUX.2 [pro] specifications side by side
SpecificationSeedream 4.0ByteDance SeedFLUX.2 [pro]Black Forest Labs
Quality (blind human votes)
Text to image arenaElo-style score · higher is better1,139 ±7#40 of 82 · 12,563 votes1,153 ±3#32 of 82 · 223,179 votes (best)
Image editing arenaElo-style score · higher is better1,267 ±7#34 of 61 · 210,031 votes (best)1,247 ±3#38 of 61 · 673,136 votes
Price
Starting price—$0.03/image 1 MP
How it is billed—Billed per megapixel; editing costs more.
Output
ProducesImagesImages
Images per request—Up to 1
Inputs
Text promptsYesYes
Reference images (editing)YesYes
Max reference images—8
Access
WeightsProprietaryProprietary
API hosts11
ReleasedSep 9, 2025Nov 25, 2025
03 — Questions

Which should you choose?

Which is better, Seedream 4.0 or FLUX.2 [pro]?

For text to image, voters prefer FLUX.2 [pro] (Seedream 4.0 1,139 (#40) · FLUX.2 [pro] 1,153 (#32)). For image editing, voters prefer Seedream 4.0 (Seedream 4.0 1,267 (#34) · FLUX.2 [pro] 1,247 (#38)). 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?

FLUX.2 [pro] costs from $0.03/image (1 MP). Seedream 4.0 has no published per-image price. Prices are list rates and change often; check the lab before budgeting.

What is the difference between Seedream 4.0 and FLUX.2 [pro]?

Seedream 4.0 is an image model from ByteDance Seed (Sep 9, 2025), taking text prompts and reference images and producing images. FLUX.2 [pro] is an image model from Black Forest Labs (Nov 25, 2025), taking text prompts and reference images and producing images.

Which is newer?

Seedream 4.0 Sep 9, 2025; FLUX.2 [pro] Nov 25, 2025.

Which can edit an existing image?

Takes a reference image as input: Seedream 4.0 yes; FLUX.2 [pro] 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

Related comparisons