ByteDance Seed: Seed 2.1 Turbo

bytedance-seed/seed-2-1-turbo

Try Seed 2.1 Turbo for free in your browser, and add it to your app for free with Puter.js AI API.

Try it free Add to your app

// npm install @heyputer/puter.js
import { puter } from '@heyputer/puter.js';

puter.ai.chat("Explain quantum computing in simple terms", {
    model: "bytedance-seed/seed-2-1-turbo"
}).then(response => {
    document.body.innerHTML = response.message.content;
});

<html>
<body>
    <script src="https://js.puter.com/v2/"></script>
    <script>
        puter.ai.chat("Explain quantum computing in simple terms", {
            model: "bytedance-seed/seed-2-1-turbo"
        }).then(response => {
            document.body.innerHTML = response.message.content;
        });
    </script>
</body>
</html>

Model Card

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.

Context Window 262K

tokens

Max Output 236K

tokens

Input Cost $0.5

per million tokens

Output Cost $2.5

per million tokens

Release Date Aug 12, 2026

Try Seed 2.1 Turbo for free

Try Seed 2.1 Turbo instantly in your browser.
This playground uses the Puter.js AI API — no API keys or setup required.

Chat bytedance-seed/seed-2-1-turbo

Chat with Seed 2.1 Turbo

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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.

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Frequently Asked Questions

How do I use Seed 2.1 Turbo?

You can access Seed 2.1 Turbo by ByteDance Seed 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. You can also use it with Python or cURL via Puter's OpenAI-compatible API.

Can I try Seed 2.1 Turbo for free?

Seed 2.1 Turbo is free to try with a Puter account. Every account includes a free AI allowance, and you can chat with it in the playground on this page. You can upgrade your account anytime for a larger allowance.

Is the Seed 2.1 Turbo API free for developers?

Seed 2.1 Turbo 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.

What is the pricing for Seed 2.1 Turbo?

Seed 2.1 Turbo costs $0.5 per 1M input tokens and $2.5 per 1M output tokens.

	Price per 1M tokens
Input	$0.5
Output	$2.5

Who created Seed 2.1 Turbo?

Seed 2.1 Turbo was created by ByteDance Seed and released on Aug 12, 2026.

What is the context window of Seed 2.1 Turbo?

Seed 2.1 Turbo supports a context window of 262K tokens. For reference, that is roughly equivalent to 524 pages of text.

What is the max output length of Seed 2.1 Turbo?

Seed 2.1 Turbo can generate up to 236K tokens in a single response.

Does it work with React / Vue / Vanilla JS / Node / etc.?

Yes — the Seed 2.1 Turbo 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 Seed 2.1 Turbo to your app for free

Developers can integrate Seed 2.1 Turbo for free using the Puter.js AI API.
With the User-Pays Model, each user covers their own AI usage instead of the developer.

Get started How pricing works