ByteDance: Seed 2.1 Turbo
bytedance/seed-2.1-turbo
Access Seed 2.1 Turbo from ByteDance using the Puter.js AI API.
Get Started// npm install @heyputer/puter.js
import { puter } from '@heyputer/puter.js';
puter.ai.chat("Explain quantum computing in simple terms", {
model: "bytedance/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-2.1-turbo"
}).then(response => {
document.body.innerHTML = response.message.content;
});
</script>
</body>
</html>
Model Card
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.
Context Window 256K
tokens
Max Output 256K
tokens
Input Cost $0.5
per million tokens
Output Cost $2.5
per million tokens
Input text, image
modalities
Tool Use Yes
Release Date Jun 23, 2026
Model Playground
Try Seed 2.1 Turbo instantly in your browser.
This playground uses the Puter.js AI API — no API keys or setup required.
More AI Models From ByteDance
Seed 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.
ChatSeed 2.0 Pro
Seed 2.0 Pro is the flagship model in ByteDance's Seed 2.0 series, built for long-chain reasoning, coding, and agent workflows. It accepts text, image, and video input and returns text. On benchmarks it scores 98.3 on AIME 2025, 87.8 on LiveCodeBench v6, and 76.5% on SWE-Bench Verified, with a Codeforces rating of 3020. For agent tasks it reaches 90.4 on tau2-Bench Retail and 77.3 on BrowseComp, and it ranks sixth on the LMArena leaderboard alongside GPT-5.2, Claude Opus 4.5, and Gemini 3 Pro. At $0.50 per million input tokens and $3 per million output tokens with a 256K context window, it is priced well below the frontier models it competes with, a fit for coding agents and complex multi-step workflows.
ChatSeed 1.8
Seed 1.8 is an agentic multimodal model from ByteDance's Seed team that combines search, code, and GUI agent capabilities in a single system. It accepts text, image, and video input and supports three thinking modes that adjust reasoning depth to task complexity. ByteDance reports 67.6 on BrowseComp-en for web search tasks and 87.8 on VideoMME for long-form video understanding, and says the model approaches Gemini 3 Pro on most multimodal tasks while surpassing it on BrowseComp-en. With a 256K context window and tool calling, it fits multi-step agent workflows such as web research, code generation, and GUI automation over screenshots.
Frequently Asked Questions
You can access Seed 2.1 Turbo 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. You can also use it with Python or cURL via Puter's OpenAI-compatible API.
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.
| Price per 1M tokens | |
|---|---|
| Input | $0.5 |
| Output | $2.5 |
Seed 2.1 Turbo was created by ByteDance and released on Jun 23, 2026.
Seed 2.1 Turbo supports a context window of 256K tokens. For reference, that is roughly equivalent to 512 pages of text.
Seed 2.1 Turbo can generate up to 256K tokens in a single response.
Seed 2.1 Turbo accepts the following input types: text, image. It produces: text.
Yes, Seed 2.1 Turbo supports tool use (function calling), allowing it to interact with external tools, APIs, and data sources as part of its response flow.
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.