Seedream 4.0
Unified 4K image generation and editing model.
About
Seedream 4.0 is ByteDance Seed's multimodal image model that unifies text-to-image generation and image editing in one system, producing 2K images in under two seconds and up to 4K resolution. It supports natural-language edits and up to six reference images for character and style consistency, and topped Artificial Analysis's blind-voting arenas for both text-to-image and image editing (ELO 1,205).
It is API-only via Dreamina, Doubao, and Volcano Engine ($30 per 1,000 generations) — no open weights, and no technical report has been published.
Specs
Context window
Pricing
Free quota
API access
Weights
Released
Benchmarks
Artificial Analysis ELO 1,205 (top of text-to-image and image-editing arenas, independent); MagicBench internal tests (company-reported).
Provider-reported unless a source says otherwise. Benchmarks are marketing-adjacent by nature — treat them as directional.
Use cases
Trust score — 6/10
Scored 6/10 (metrics tier, metrics-v1). Evidence: strong market traction vs Nano Banana; topped independent Artificial Analysis arenas; API-only, no weights, no published technical report; capped at 6 for closed, unverifiable-internals model. License: Proprietary; API access via ByteDance platforms..
How the trust score is built
Full methodology →- Adoption · stars/downloads, log-scaled vs peers
- 8.0/10
- Maintenance · recency, releases, issue load
- 6.0/10
- Openness · license + docs
- 2.0/10
- Manual review · sanity read + red-flag check
- 7.0/10
- · strong market traction vs Nano Banana; topped independent Artificial Analysis arenas
- · API-only, no weights, no published technical report
- · capped at 6 for closed, unverifiable-internals model