Seedream 4.0

ByteDance

ByteDance's unified image generation and editing model (2025), combining creation and editing in a single architecture. Seedream 4.0 produces up to 4K images with ~1.8-second generation, strong reference consistency, and batch processing, and is served via API partners like fal and Replicate.

Strengths

Unified image generation and editing in one architecture
Up to 4K resolution output
Very fast ~1.8-second generation
Strong reference consistency across edits
Efficient batch processing

Caveats

Proprietary - API/app access only
Served mainly through third-party API partners
Newer ecosystem than Western incumbents

Vendor: ByteDance
License: Proprietary
Modalities: text
image

Capabilities

Vision

Audio

Video

Tool Use

Resources

API Documentation

Pricing

Per-image pricing via API partners (fal, Replicate, WaveSpeed); also available in ByteDance/Doubao consumer apps.