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

Seedream 4.5 vs FLUX.2 [pro]

Preferred for text to image: Too close to call · Preferred for image editing: Seedream 4.5 · Newest: Seedream 4.5. Quality scores are blind human-preference votes; specs and prices come from each lab’s listings.

  1. ByteDance Seed

    Seedream 4.5

    Released Dec 3, 2025

    • Text to image
    • Image editing
    • Arena1,303
    • From—
    • Max size—
    Full specs Remove Seedream 4.5

  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 imageToo close to callSeedream 4.5 1,149 (#35) · FLUX.2 [pro] 1,153 (#32) — blind human votes
  • Preferred for image editingSeedream 4.5Seedream 4.5 1,303 (#27) · FLUX.2 [pro] 1,247 (#38) — blind human votes
  • NewestSeedream 4.5Seedream 4.5 Dec 3, 2025 · FLUX.2 [pro] Nov 25, 2025
  • Widest inputsSame inputsSeedream 4.5: Text prompts, Reference images · FLUX.2 [pro]: Text prompts, Reference images
  • Image editingBoth edit imagesTakes a reference image as input: Seedream 4.5 yes · FLUX.2 [pro] yes
  • Self-hostingNo open weightsBoth are available only through APIs and apps
  • Most API hostsSame reachSeedream 4.5: 1 · FLUX.2 [pro]: 1
02 — Side by side

Every spec in one table

Dashes mean the data is not published.

Seedream 4.5 vs FLUX.2 [pro] specifications side by side
SpecificationSeedream 4.5ByteDance SeedFLUX.2 [pro]Black Forest Labs
Quality (blind human votes)
Text to image arenaElo-style score · higher is better1,149 ±3#35 of 82 · 318,120 votes1,153 ±3#32 of 82 · 223,179 votes (best)
Image editing arenaElo-style score · higher is better1,303 ±2#27 of 61 · 1,361,328 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
ReleasedDec 3, 2025Nov 25, 2025
03 — Questions

Which should you choose?

Which is better, Seedream 4.5 or FLUX.2 [pro]?

For text to image, voters rate them about the same (Seedream 4.5 1,149 (#35) · FLUX.2 [pro] 1,153 (#32)). For image editing, voters prefer Seedream 4.5 (Seedream 4.5 1,303 (#27) · 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 4.5 has no published per-image price. Prices are list rates and change often; check the lab before budgeting.

What is the difference between Seedream 4.5 and FLUX.2 [pro]?

Seedream 4.5 is an image model from ByteDance Seed (Dec 3, 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 4.5 Dec 3, 2025; FLUX.2 [pro] Nov 25, 2025.

Which can edit an existing image?

Takes a reference image as input: Seedream 4.5 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

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