Seed 2.1 Turbo overview
Seed 2.1 Turbo specs
- Model ID
bytedance-seed/seed-2-1-turbo- Developer
- ByteDance
- Context window
- 262,144 tokens
- Max output
- 262,144 tokens
- Input
- Image, Text
- Output
- Text
- API
- OpenAI-compatible, base URL
https://api.aimlapi.com/v1
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.
Use cases
High-value office work and complex everyday consultations, including multi-step tasks such as project planning, file processing, and tool use.
Code engineering workflows, including requirement understanding, coding, debugging, and validation in real development work.
Teaching, office, and research scenarios, such as generating lesson-plan slides, analyzing complex spreadsheets, and producing industry reports.
Capabilities
- Reasoning
- Streaming
- Structured outputs
- Function calling
- Vision
- Web search
Seed 2.1 Turbo API pricing
| Usage | Price | Unit |
|---|---|---|
| Input | $0.529 | 1M tokens |
| Output | $2.65 | 1M tokens |
Prices from the AI/ML API price list, checked on Nov 4, 2026.
Seed 2.1 Turbo vs other models: token prices
AI/ML API input and output rates for 5 models, per million tokens.
| Model | Input | Output |
|---|---|---|
| $0.529 | $2.65 | |
| $0.1 | $0.4 | |
| $0.25 | $2 | |
| $0.5 | $3 | |
| $0.529 | $3.17 |
How to use the Seed 2.1 Turbo API
View docsBuild with your agent
Give your agent the model details, code and documentation.
1Get your API key
Create API keyexport AIMLAPI_KEY="8f2b4c7d9a1e6b3f…"2Make your first request
curl '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": "Write a haiku about the ocean."
}
]
}'import os
import requests
headers = {
"Authorization": f"Bearer {os.environ['AIMLAPI_KEY']}",
"Content-Type": "application/json",
}
payload = {
"model": "bytedance-seed/seed-2-1-turbo",
"messages": [
{
"role": "user",
"content": "Write a haiku about the ocean."
}
]
}
response = requests.post("https://api.aimlapi.com/v1/chat/completions", headers=headers, json=payload, timeout=120)
response.raise_for_status()
print(response.json())const response = 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": "Write a haiku about the ocean."
}
]
}),
});
if (!response.ok) throw new Error(`HTTP ${response.status}`);
console.log(await response.json());Related articles
Seed 2.1 Turbo FAQ
What is the context window of Seed 2.1 Turbo?
Seed 2.1 Turbo has a 262,144 tokens context window and can return up to 262,144 tokens.
What inputs and outputs does Seed 2.1 Turbo support?
Seed 2.1 Turbo takes image, text as input and returns text.
What is the model ID for Seed 2.1 Turbo?
Use bytedance-seed/seed-2-1-turbo as the model id. Requests go to https://api.aimlapi.com/v1/chat/completions.
When was Seed 2.1 Turbo released?
Seed 2.1 Turbo became available on August 10, 2026.
How much does Seed 2.1 Turbo cost?
Seed 2.1 Turbo costs $0.529 input and $2.65 output per 1M tokens on AI/ML API, billed as you go with no subscription.
Does Seed 2.1 Turbo support streaming?
Yes, Seed 2.1 Turbo can stream responses as they are generated.
Can Seed 2.1 Turbo read images?
Yes, Seed 2.1 Turbo accepts image input alongside text.
Who created Seed 2.1 Turbo?
Seed 2.1 Turbo was built by ByteDance.
What is Seed 2.1 Turbo best suited for?
It is designed for coding tasks and long-horizon agent workflows, handling text and image input.
