Seedream 4.5
ByteDance
Key facts · verified Oct 27, 2026
Seedream 4.5 is a ByteDance image generation model released on 28 Nov 2025. Pricing: $0.04 per output image; input images free (BytePlus ModelArk). It ranks #35 on LMArena's text-to-image leaderboard (Elo 1149, read 2 Nov 2026). Source: docs.byteplus.com.
ByteDance's Seedream 4.5 image model on BytePlus ModelArk (model ID seedream-4-5-251128). It generates 2K or 4K images from text or from one or more reference images, can return a set of related images, and is billed at $0.04 per output image.
Pricing & specs checkedSource: vendor documentation · checked Oct 27, 2026LMArena: 1149 Elo (rank 35) · source · retrieved Nov 2, 2026
Pricing
$0.04 per output image; input images free (BytePlus ModelArk)
Context
Not published
LMArena Elo
LMArena rank
Key Features
Image Generation
Full Specifications
$0.04 per output image; input images free (BytePlus ModelArk) | |
|---|---|
| Identity | |
| Developer | ByteDance |
| Released | Nov 2025 |
| Cost | |
| Price per image | $0.04 per output image; input images free |
| Capacity | |
| Max resolution | 4K (2K or 4K; up to 4096×4096 at 1:1) |
| Aspect ratios | 1:16 to 16:1 |
| Images per request | Multiple — reference images plus outputs up to 15 |
| Capability | |
| Image-to-image | Yes — single or multiple reference images |
| Access | |
| API | Yes — BytePlus ModelArk |
| Measured quality | |
| LMArena Elo | 1149 (checked Nov 2026) |
| LMArena rank | Rank 35 |