What are the closest alternatives to Seedream 4.0?

The closest alternatives are FLUX.2 Flex by Black Forest Labs, FLUX.2 Pro by Black Forest Labs, and GPT-Image-1.5 by OpenAI. They were matched on model kind and release date, with no comparable price.

What is the best open-weight alternative to Seedream 4.0?

Qwen-Image-2.1 is the best open-weight alternative. It is the highest-ranked open-weight model on Arena Text to Image at rank 21.

Is Seedream 4.0 open source or open weights?

No, Seedream 4.0 is closed. Its license is Proprietary.

Who made Seedream 4.0 and when was it released?

Seedream 4.0 was made by ByteDance and released on September 9, 2025.

Can Seedream 4.0 edit existing images?

Yes, Seedream 4.0 supports image editing with image input.

Where does Seedream 4.0 rank on the Arena image leaderboards?

On Arena Image Edit, Seedream 4.0 ranks 36 with a score of 1267. On Arena Text to Image, it ranks 43 with a score of 1138. Both are Arena's own ranks.

Seedream 4.0

ByteDance

Announcement

Seedream 4.0

Developer	ByteDance
Release date	September 9, 2025
Family	Seedream
Generation	Seedream 4
Input	Text, image
Output	Image
Weights	Closed
License	Proprietary
Successor	Seedream 4.5
Website	bytedance.com

Part of a series on

ByteDance

Pricing: Not published
Released: 1y ago

Seedream 4.0 is an image generation and editing model developed by the ByteDance Seed team, succeeding Seedream 3.0 and SeedEdit 3.0. Its launch centers on a unified architecture that handles both text-to-image generation and general-purpose editing with reasoning and world knowledge, and ByteDance claims image generation more than 10 times faster than Seedream 3.0. It is built for creative image work such as editing, reference-guided generation, and style control.