How do I use Seed 2.1 Turbo through YepAPI?

Sign up for a free API key, then send requests to the /v1/ai/chat endpoint.

ByteDanceText Generation/v1/ai/chat

Seed 2.1 Turbo

Access Seed 2.1 Turbo through one API key. ByteDance Multimodal Coding Agent.

Seed 2.1 Turbo is a multimodal model from ByteDance Seed for coding and long-horizon agent workflows, suited for end-to-end software delivery, multi-step task execution and understanding visual and video input. Seed 2.1 Turbo is a capable, cheap engine for coding agents that also need to read screenshots and recordings, and it succeeds Seed 2.0 Lite as the seed alias target.

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2,400+

Developers

1.2M+

API calls served

100+

Endpoints

$0.01

Per call

Yep, that's it.

Try it live

Send a message and see Seed 2.1 Turbo respond in real time.

POST/v1/ai/chatbytedance-seed/seed-2-1-turbo

Message *

Max Tokens

Maximum tokens in the response.

Stream

Real-time tokens

Hit "Send Request" to see the response

Context Window

262K tokens

Max Output

236K tokens

Input Price

$0.74 / 1M tokens

Output Price

$3.69 / 1M tokens

Strengths

✓

Built for coding agents

Tuned for end-to-end software delivery and multi-step execution.

✓

Visual and video input

Accepts text, images and video.

✓

262K context, 236K output

Handles up to 262,144 input tokens and returns up to 235,929 output tokens per call.

✓

Low cost

$0.74 per 1M input and $3.69 per 1M output tokens.

Quick start

Copy this snippet and start making calls with Seed 2.1 Turbo.

const res = await fetch('https://api.yepapi.com/v1/ai/chat', {
  method: 'POST',
  headers: {
    'x-api-key': 'YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    "model": "bytedance-seed/seed-2-1-turbo",
    "messages": [
      {
        "role": "user",
        "content": "Explain API gateways in 2 sentences."
      }
    ],
    "maxTokens": 256
  }),
});
const { data } = await res.json();
console.log(data.message.content);

Why use Seed 2.1 Turbo through YepAPI?

✓One API key for all models — no separate accounts

✓OpenAI SDK compatible — just change the base URL

✓No monthly minimums — pay per token

✓Switch models with one line of code

✓Full provider passthrough — citations, search results, and all extras included

✓Streaming and non-streaming support on every model

✓Works with Cursor, Claude, LangChain, and any LLM tool

✓Unified billing across all providers

Seed 2.1 Turbo API — pricing, context window & access

Seed 2.1 Turbo is a multimodal model from ByteDance Seed for coding and long-horizon agent workflows, suited for end-to-end software delivery, multi-step task execution and understanding visual and video input. It pairs a 262,144-token context window with up to 235,929 output tokens per response, at $0.74 per 1M input and $3.69 per 1M output tokens through YepAPI.

Through YepAPI you call Seed 2.1 Turbo on an OpenAI-compatible endpoint with a single key — the same key that reaches GPT-6, Claude, Gemini, Grok and the SEO, SERP and scraping APIs. Input: text, images, video.

What is Seed 2.1 Turbo?

Seed 2.1 Turbo is a multimodal model from ByteDance Seed for coding and long-horizon agent workflows, suited for end-to-end software delivery, multi-step task execution and understanding visual and video input. It offers a 262,144-token context window and up to 235,929 output tokens at $0.74 / $3.69 per 1M tokens. It accepts text, images, video as input, handles up to 262,144 tokens of context and returns up to 235,929 output tokens per call.

Build with Seed 2.1 Turbo via YepAPI

YepAPI serves Seed 2.1 Turbo on the OpenAI-compatible /v1/ai/chat endpoint. Point your base URL at YepAPI, add your key, and set the model string to seed-2-1-turbo (or the full bytedance-seed/seed-2-1-turbo). Function calling, structured outputs and reasoning settings pass straight through, and switching to any other model on the platform is a one-string change per request.

Seed 2.1 Turbo API pricing — $0.74 / 1M input, $3.69 / 1M output

Seed 2.1 Turbo costs $0.74 per 1M input tokens and $3.69 per 1M output tokens through YepAPI, pay per token with no minimums. Failed calls are never charged, and every request is itemised in your dashboard API Logs so you can see exactly what a very long response cost.

Seed 2.1 Turbo use cases

Seed 2.1 Turbo is a capable, cheap engine for coding agents that also need to read screenshots and recordings, and it succeeds Seed 2.0 Lite as the seed alias target.

Try Seed 2.1 Turbo free

Every new YepAPI account includes $5 in free credit with no card required — enough to test Seed 2.1 Turbo on your own prompts before committing to paid usage. Create an account, copy your key, and call seed-2-1-turbo right away.