Next-generation coding and agent model with engineering-grade code delivery, long-horizon autonomy, and 256K multimodal understanding.
ByteDanceText Generation256K contextReleased Jul 13, 2026MalaysiaProprietary EndpointNewNext-generation coding and agent model with engineering-grade code delivery, long-horizon autonomy, and 256K multimodal understanding.
Also known as Seed Turbo, ByteDance Seed 2.1 Turbo, Seed-2.1-Turbo, seed-2-1-turbo
seed-2-1-turbo/v1/chat/completionsPOST/v1/responsesPOST/v1/messagesPOST/v1beta/models/seed-2-1-turbo:generateContentbytedance/seed-2-1-turbodola-seed-2.1-turbodola-seed-2-1-turbo-260628Live pay-as-you-go rates from the EmpirioLabs catalog. You are billed only for what you use, with no monthly minimum.
Seed 2.1 Turbo serves the OpenAI-compatible Chat Completions API. Point any OpenAI SDK at https://api.empiriolabs.ai/v1 with your EmpirioLabs API key and use the model id seed-2-1-turbo. Get an API key from the EmpirioLabs dashboard.
curl https://api.empiriolabs.ai/v1/chat/completions \
-H "Authorization: Bearer $EMPIRIOLABS_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "seed-2-1-turbo",
"messages": [
{"role": "user", "content": "Write a haiku about the ocean."}
]
}'from openai import OpenAI
client = OpenAI(
base_url="https://api.empiriolabs.ai/v1",
api_key="YOUR_EMPIRIOLABS_API_KEY",
)
response = client.chat.completions.create(
model="seed-2-1-turbo",
messages=[{"role": "user", "content": "Write a haiku about the ocean."}],
)
print(response.choices[0].message.content)Request parameters supported by the Seed 2.1 Turbo API on EmpirioLabs. Defaults apply when a field is omitted.
| Parameter | Type | Default | Range / values | Description |
|---|---|---|---|---|
| max_tokens | number | 4096 | 1 to 65536 | Max output tokens |
| frequency_penalty | number | 0 | -2 to 2 | Penalty for repeated tokens. >0 reduces repetition, <0 encourages it. |
| presence_penalty | number | 0 | -2 to 2 | Penalty for new vs. seen tokens. >0 encourages new topics, <0 encourages staying on topic. |
| stop | string | - | - | Comma-separated stop sequences |
| enable_thinking | boolean | true | - | Enable deep thinking / reasoning mode. |
| reasoning_effort | enum | high | low, medium, high | Reasoning effort tier. Use enable_thinking=false to disable reasoning entirely. |
| enable_web_search | boolean | false | - | Enable web search: retrieves live web results and provides them to the model as additional context. |
| image_detail | enum | high | low, high, xhigh | Image visual quality tier for vision input. |
| video_fps | number | - | 0.2 to 5 | Frames per second extracted from video input. |
| response_format | enum | - | - | Constrain the output to JSON. Use JSON mode for any valid JSON object, or JSON schema to force output that matches a schema you provide. |
Per-token pricing is flat across the full 256K context, with no higher rate above 128K. Reasoning is on by default; set enable_thinking to false to answer directly without it.
On EmpirioLabs, Seed 2.1 Turbo is billed pay as you go: Input $0.63 per 1M prompt tokens; Output $3.13 per 1M generated tokens. The live rate card on this page always matches what the API charges.
Seed 2.1 Turbo supports a 256K-token context window with up to 65,536 output tokens per response.
Yes. Seed 2.1 Turbo serves the OpenAI-compatible Chat Completions API, so existing OpenAI SDKs work by pointing base_url at https://api.empiriolabs.ai/v1 and setting the model id to seed-2-1-turbo.
Yes. The EmpirioLabs playground runs Seed 2.1 Turbo in the browser with the same parameters the API exposes, so you can test prompts before writing code.
Create an EmpirioLabs account, then generate a key under API Keys in the dashboard. Billing is pay-as-you-go credits, so you only pay for the requests you make.
Check out our pricing or reach out if you want your own model deployed on our stack.
