ByteDance Seed API
Access ByteDance Seed instantly with Puter.js, and add AI to any app in a few lines of code without backend or API keys.
// npm install @heyputer/puter.js
import { puter } from '@heyputer/puter.js';
puter.ai.chat("Explain AI like I'm five!", {
model: "bytedance-seed/seed-2-1-turbo"
}).then(response => {
console.log(response);
});
<html>
<body>
<script src="https://js.puter.com/v2/"></script>
<script>
puter.ai.chat("Explain AI like I'm five!", {
model: "bytedance-seed/seed-2-1-turbo"
}).then(response => {
console.log(response);
});
</script>
</body>
</html>
List of ByteDance Seed Models
Seed 2.1 Turbo
bytedance-seed/seed-2-1-turbo
Seed 2.1 Turbo is ByteDance's faster, lower-cost variant of the Seed 2.1 model family, released alongside Seed 2.1 Pro at its Volcano Engine FORCE conference in June 2026. It carries the same feature set as Pro, including coding engineering across full project cycles, long-chain agent workflows with multi-step tool use, and multimodal understanding of text, image, and video. ByteDance says the Seed 2.1 series matches GPT-5.5 on these three capability pillars, though that claim is vendor-reported and has not been independently verified. No Turbo-specific benchmark scores have been published separately from Pro. Turbo is priced at about half of Seed 2.1 Pro per token, which suits enterprise teams running high volumes of API calls, such as agent pipelines and document or image processing, where cost and latency matter more than peak capability.
ChatSeed 2.0 Lite
bytedance-seed/seed-2.0-lite
Seed 2.0 Lite is ByteDance's mid-tier general-purpose LLM that balances strong performance with cost efficiency, scoring 93 on AIME 2025 and 2233 on Codeforces while supporting text, image, and video understanding plus tool-calling capabilities. It serves as the default production-grade model in the Seed 2.0 family, handling roughly 95% of enterprise workloads at about half the cost of the flagship Pro variant. It supports a 256K context window and is positioned as a high-performance alternative for tasks like code review, document processing, information synthesis, and agent-based workflows.
ChatSeed 2.0 Mini
bytedance-seed/seed-2.0-mini
Seed 2.0 Mini is ByteDance's most lightweight and inference-efficient model in the Seed 2.0 family, released in February 2026 and optimized for low-latency, high-concurrency, and cost-sensitive applications. It features a 256K context window, multimodal capabilities (text, image, video), and a unique 4-level reasoning effort system. Despite being the smallest variant, it delivers strong benchmark scores (AIME 2025: 87.0, SWE-Bench: 67.9) at an extremely competitive price of $0.1/M input tokens.
ChatSeed 1.6
bytedance-seed/seed-1.6
Seed 1.6 is a general-purpose multimodal AI model by ByteDance featuring adaptive deep thinking, a 256K context window, and a sparse Mixture-of-Experts architecture with 230B total parameters (23B active per forward pass).
ChatSeed 1.6 Flash
bytedance-seed/seed-1.6-flash
Seed 1.6 Flash is an ultra-fast multimodal model by ByteDance optimized for high-throughput and low-latency inference, supporting text, image, and video inputs with a 256K context window and up to 16K output tokens.
ImageSeedream 4.0
bytedance-seed/seedream-4.0
Seedream 3.0
bytedance-seed/seedream-3.0
Frequently Asked Questions
The ByteDance Seed API gives you access to models for AI chat and image generation. Through Puter.js, you can start using ByteDance Seed models instantly with zero setup or configuration.
Puter.js supports a variety of ByteDance Seed models, including Seed 2.1 Turbo, Seed 2.0 Lite, Seed 2.0 Mini, and more. Find all AI models supported by Puter.js in the AI model list.
With the User-Pays model, users cover their own AI costs through their Puter account. This means you can build apps without worrying about infrastructure expenses.
Puter.js is a JavaScript library that provides access to AI, storage, and other cloud services directly from a single API. It handles authentication, infrastructure, and scaling so you can focus on building your app.
Yes — the ByteDance Seed API through Puter.js works with any JavaScript framework, Node.js, or plain HTML. Just include the library and start building. See the documentation for more details.
Related Resources
Free, Unlimited ByteDance Seed API
Complete guide to using ByteDance Seed models for AI chat with Puter.js.
Free, Unlimited ByteDance Seedream API
Generate images using ByteDance Seedream models with Puter.js.
Free, Unlimited ByteDance Seedance API
Create AI-powered videos with ByteDance Seedance models.