ByteDance

Seedream 4.5

Name: ByteDance Seedream 4.5
Author: ByteDance

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Model ID:seedream-4-5-251128

2025-11-28

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Seedream 4.5 is ByteDance's premium image generation and editing model released in December 2025, delivering all-round improvements over Seedream 4.0 in subject identification accuracy, reference image fidelity, and typographic rendering — including dense small-text and multi-line layouts. It supports up to 14 reference images per request, produces outputs at up to 4K resolution, and ranks among the top models on the LM Arena global image generation leaderboard. Generation takes 8 to 14 seconds depending on complexity, prioritizing output quality over speed for final production assets such as brand campaigns, product photography, and client-facing creative work.

API|Vision|Proprietary Model

Knowledge Cutoff

Unknown

The date this AI finished learning. It may not know about things that happened after this date.

Input → Output Format

The types of content this AI can receive, and what it can produce in return.

Context Memory

N/A

The maximum amount of text the AI can read and process in a single request. A larger number means it can handle longer documents or conversations.

API Cost

$0.04/ img

The cost when using without a subscription plan. Pricing may vary by quality, resolution, or generation mode.

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AI Performance Evaluation

Arena Image Score

1142

±3

As of 2026-04-23

Overall Rank

No.18

165,241 Votes

Arena by Image Category

Art

1152±6No.18

Cartoon

1144±5No.18

Photorealistic

1158±5No.13

Portraits

1162±6No.13

Text Rendering

1139±5No.21

3D Modeling

1142±7No.19

Commercial Design

1138±5No.20

Source:Arena Intelligence

ByteDance