Seed 2.1 Turbo API

ByteDance Seed 2.1 Turbo is a multimodal model for coding and long-horizon agent workflows, accepting text, image and video input across a 256K context window.
Context
262K tokens
Input
$0.65 / 1M
Output
$3.25 / 1M
Released
Aug 10, 2026

How to use Seed 2.1 Turbo API

Install any OpenAI-compatible SDK, point it at api.aimlapi.com/v1, and set the model to bytedance-seed/seed-2-1-turbo.
import requests

r = requests.post(
    "https://api.aimlapi.com/v1/chat/completions",
    headers={"Authorization": "Bearer " + AIMLAPI_KEY},
    json={
      "model": "bytedance-seed/seed-2-1-turbo",
      "messages": [
        {
          "role": "user",
          "content": "Hello!"
        }
      ]
    },
)
print(r.json())
const r = await fetch("https://api.aimlapi.com/v1/chat/completions", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.AIMLAPI_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "model": "bytedance-seed/seed-2-1-turbo",
    "messages": [
      {
        "role": "user",
        "content": "Hello!"
      }
    ]
  }),
});
console.log(await r.json());
curl -X POST https://api.aimlapi.com/v1/chat/completions \
  -H "Authorization: Bearer $AIMLAPI_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"bytedance-seed/seed-2-1-turbo","messages":[{"role":"user","content":"Hello!"}]}'

OpenAI-compatible — swap the base URL and it works with your existing SDK.

Seed 2.1 Turbo API Pricing

TypePrice
Input
$0.65 / 1M tokens
Output
$3.25 / 1M tokens

Seed 2.1 Turbo vs other models

ModelInputOutputContextBest for
$0.65 / 1M
$3.25 / 1M
262K tokens
Long-horizon coding agents
$0.325 / 1M
$2.6 / 1M
262K tokens
Reasoning + agents
$2.6 / 1M
$7.8 / 1M
500K tokens
Reasoning + agents with long context
$6.5 / 1M
$39 / 1M
1M tokens
Frontier reasoning + agents
$0.65 / 1M
$3.9 / 1M
262K tokens
Agentic frontend & coding workflows

Start building with Seed 2.1 Turbo

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