ByteDance: Seedream 4.5
bytedance/seedream-4.5
Access Seedream 4.5 from ByteDance using the Puter.js AI API.
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Model Card
Seedream 4.5 is ByteDance's text-to-image and image-editing model, released in December 2025 as the follow-up to Seedream 4.0. It renders at 1K, 2K, and 4K resolution across multiple aspect ratios, can return up to 10 images per request, and accepts up to 14 reference images for multi-image editing.
ByteDance says it improves on Seedream 4.0 in editing consistency, including better preservation of subject details, lighting, and color tone, along with sharper portrait refinement and small-text rendering. That makes it suited to tasks like product swaps, text overlay copying, and element repositioning across a reference set rather than a single one-off generation. It has placed on the Arena text-to-image leaderboard, an independent crowdsourced ranking of image models.
Cost Per Image $0.04
per generation
Configuration output
resolution
Release Date Dec 23, 2025
Code Example
Use Seedream 4.5 in your app with the Puter.js AI API — no API keys or setup required.
// npm install @heyputer/puter.js
import { puter } from '@heyputer/puter.js';
puter.ai.txt2img("A serene mountain landscape at sunset", {
model: "bytedance/seedream-4.5"
}).then(image => {
document.body.appendChild(image);
});
<html>
<body>
<script src="https://js.puter.com/v2/"></script>
<script>
puter.ai.txt2img("A serene mountain landscape at sunset", {
model: "bytedance/seedream-4.5"
}).then(image => {
document.body.appendChild(image);
});
</script>
</body>
</html>
More AI Models From ByteDance
Seed 2.1 Turbo
Seed 2.1 Turbo is the faster, lower-cost variant in ByteDance's Seed 2.1 family, a model line built for coding, long-horizon agent tasks, and multimodal understanding. It accepts text and image input, has a 256K context window, and supports function calling in an OpenAI-compatible format, so existing tool-use pipelines port over with little change. ByteDance positions it for high-volume production workloads such as agent pipelines, coding assistance, and document processing, and prices it at roughly half the cost of Seed 2.1 Pro. The company reports performance close to the Pro version and comparable to GPT-5.5 on coding and agent tasks, though no independently verified benchmark scores for Turbo were published at launch. Choose it when volume and cost drive the decision rather than peak capability; Seed 2.1 Pro remains the stronger option for the hardest tasks.
ImageSeedream 5 Lite
Seedream 5 Lite is a lighter, faster tier of ByteDance's Seedream 5 image generation line, launched in February 2026. Seedream is ByteDance's flagship text-to-image and editing model family; this specific release is new enough that we did not find independent third-party benchmarks for it yet, so treat capability claims below as ByteDance's own. ByteDance describes it as the first Seedream model with web-connected retrieval, letting it draw on live online information during generation, plus multi-step reasoning and example-based editing, where a before/after reference pair shows the model what transformation to apply instead of describing it in words. It accepts up to 14 reference images and outputs at 2K or 3K resolution with aspect ratio control from 1:1 to 21:9, which fits editing work defined by example rather than by prompt alone.
ChatSeed 2.0 Code
Seed 2.0 Code is ByteDance's dedicated coding model, released with the Seed 2.0 family in February 2026. It is built for agentic software work rather than autocomplete, with a stated focus on decomposing tasks into plans and revising those plans as work progresses, which suits multi-step feature implementation and bug diagnosis and repair. The model accepts image input alongside text, so it can read design mockups, screenshots, and charts and generate code from them. ByteDance cites high-precision text extraction and chart understanding as part of its multimodal perception. It has a 256K context window and up to 128K output tokens. ByteDance has not published benchmark scores for the Code variant. The same model powers coding in TRAE, ByteDance's AI IDE.
Frequently Asked Questions
You can access Seedream 4.5 by ByteDance through Puter.js AI API. Include the library in your web app or Node.js project and start making calls with just a few lines of JavaScript — no backend and no configuration required.
Seedream 4.5 is free to integrate using the Puter.js AI API. With the User-Pays Model, you can add AI to your app for $0, since users cover their own AI usage through their Puter account.
| Price | |
|---|---|
| Per image | $0.04 |
Seedream 4.5 was created by ByteDance and released on Dec 23, 2025.
Yes — the Seedream 4.5 API works with any JavaScript framework, Node.js, or plain HTML through Puter.js. Just include the library and start building. See the documentation for more details.
Add Seedream 4.5 to your app for free
Developers can integrate Seedream 4.5 for free using the Puter.js AI API.
With the User-Pays Model, each user covers their own AI usage instead of the developer.