---
title: ByteDance Seed: Seed 2.1 Turbo | Text Generation | ModelsLab
description: Build with ByteDance Seed: Seed 2.1 Turbo API by ByteDance Seed. Text generation, chat, code, and reasoning. Plans from $21/month.
url: https://modelslab.com/models/bytedance-seed/bytedance-seed-seed-2-1-turbo.md
canonical: https://modelslab.com/models/bytedance-seed/bytedance-seed-seed-2-1-turbo
type: product
component: Playground/LLM/Index
generated_at: 2026-08-15T00:25:14.065181Z
---

ByteDance Seed: Seed 2.1 Turbo
---

 [LLMs.txt](https://modelslab.com/models/bytedance-seed/bytedance-seed-seed-2-1-turbo/llms.txt) [.md](https://modelslab.com/models/bytedance-seed/bytedance-seed-seed-2-1-turbo.md)

ByteDance Seed: Seed 2.1 Turbo
---

Choose a prompt below to get started or type your own message

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Send

### ByteDance Seed: Seed 2.1 Turbo

bytedance-seed bytedance-seed-seed-2-1-turbo

Copy model ID

PricingInput $0.50 / 1M tokens

Output $2.50 / 1M tokens

API EndpointsOpenAI Compatible

`https://modelslab.com/api/v7/llm/chat/completions`Endpoint

Anthropic Compatible

`https://modelslab.com/api/v7/llm/v1/messages`Messages

`https://modelslab.com/api/v7/llm/v1/messages/count_tokens`Count Tokens

`https://modelslab.com/api/v7/llm/v1/models`Models

Use with Claude Code

cURL Example

ParametersSystem MessageYou are a helpful AI assistant specialized in providing accurate and detailed responses.

Temperature0.7

Max Tokens1000

Top P0.9

Frequency Penalty0

Presence Penalty0

Model Info

Support

Looking for something different?
---

Models that trade off differently against the one you are viewing

### Better quality

Newer flagship models that generally produce stronger results.

[![GPT 5.2](https://images.modelslab.sh/?Image=https://assets.modelslab.ai/generations/2bdd00f4-1692-49d8-a562-72cb1753d0ff.png)](https://modelslab.com/models/openai/gpt-5.2)[OpenAI](https://modelslab.com/models/openai)

 [GPT 5.2](https://modelslab.com/models/openai/gpt-5.2)

[![Gemini 3 Pro Preview](https://images.modelslab.sh/?Image=https://assets.modelslab.ai/generations/1846e76f-9d5c-4a35-a43a-82db45b7bb8b.png)](https://modelslab.com/models/google/gemini-3-pro-preview)[Google](https://modelslab.com/models/google)

 [Gemini 3 Pro Preview](https://modelslab.com/models/google/gemini-3-pro-preview)

[![GPT 5.1](https://images.modelslab.sh/?Image=https://assets.modelslab.ai/generations/fad83520-47a8-4059-b4b9-b32adf4d0be7.png)](https://modelslab.com/models/openai/gpt5.1)[OpenAI](https://modelslab.com/models/openai)

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[![GPT-5.1-Codex-Max](https://images.modelslab.sh/?Image=https://assets.modelslab.ai/generations/06356c4c-df09-4ccb-a5c0-629da670f75b.png)](https://modelslab.com/models/openai/gpt-5.1-codex-max)[OpenAI](https://modelslab.com/models/openai)

 [GPT-5.1-Codex-Max](https://modelslab.com/models/openai/gpt-5.1-codex-max)

### Lower cost per run

Open-source models we host, unlimited on the $149/month plan.

[Modelslab: Custom LLM

Popular](https://modelslab.com/models/modelslab/uncensored-chat)[ModelsLab](https://modelslab.com/models/modelslab)

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[![Gemini 2.5 Flash](https://images.modelslab.sh/?Image=https://assets.modelslab.ai/generations/4fc6b09e-c7ae-4301-aed1-0b180b88157b.png)](https://modelslab.com/models/google/gemini-2.5-flash)[Google](https://modelslab.com/models/google)

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Closed Source Model](https://modelslab.com/models/google/gemini-2.5-flash)

[Qwen: Qwen3 235B A22B Instruct 2507](https://modelslab.com/models/qwen/qwen-qwen3-235b-a22b-2507)[Qwen](https://modelslab.com/models/open_router)

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Closed Source Model](https://modelslab.com/models/qwen/qwen-qwen3-235b-a22b-2507)

[![gpt-oss-20b](https://images.modelslab.sh/?Image=https://assets.modelslab.ai/generations/8b2f0440-52cc-4f41-93eb-d31006ad71e2.webp)](https://modelslab.com/models/openai/gpt-oss-20b)[OpenAI](https://modelslab.com/models/openai)

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Closed Source Model](https://modelslab.com/models/openai/gpt-oss-20b)

[![DeepSeek: DeepSeek V4 Flash 0423](https://images.modelslab.sh/?Image=https://assets.modelslab.ai/generations/267a7228-f392-4d3e-abb6-915fef640c49.png)](https://modelslab.com/models/deepseek/deepseek-deepseek-v4-flash)[DeepSeek](https://modelslab.com/models/open_router)

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Closed Source Model](https://modelslab.com/models/deepseek/deepseek-deepseek-v4-flash)

[![Google: Gemini 3.1 Flash Lite](https://images.modelslab.sh/?Image=https://assets.modelslab.ai/generations/05dab216-0dbb-4160-8e12-6c2984e61eea.png)](https://modelslab.com/models/google/google-gemini-3.1-flash-lite)[Google](https://modelslab.com/models/open_router)

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Closed Source Model](https://modelslab.com/models/google/google-gemini-3.1-flash-lite)

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About ByteDance Seed: Seed 2.1 Turbo
---

Seed 2.1 Turbo is a multimodal model from ByteDance Seed for coding and long-horizon agent workflows. It is suited for end-to-end software delivery, multi-step task execution, and understanding visual and...

### Technical Specifications

Model IDbytedance-seed-seed-2-1-turbo

CategoryLLM Models

TaskText Generation

Price$1.5 per million tokens

AddedAugust 12, 2026

### Key Features

- Chat completion and multi-turn conversation API
- Streaming response with token-by-token output
- Function calling and tool use support
- System prompts and role-based messaging
- JSON mode and structured output

### Quick Start

Integrate ByteDance Seed: Seed 2.1 Turbo into your application with a single API call. Get your API key from the [pricing page](https://modelslab.com/pricing) to get started.

PythonJavaScriptcURLPHP

```
<code>import requests
import json

url = "https://modelslab.com/api/v7/llm/chat/completions"

headers = {
    "Content-Type": "application/json"
}

data = {
        "model_id": "bytedance-seed-seed-2-1-turbo",
        "messages": [
            {
                "role": "user",
                "content": "Hello!"
            }
        ],
        "max_tokens": 1000,
        "key": "YOUR_API_KEY"
    }

try:
    response = requests.post(url, headers=headers, json=data)
    response.raise_for_status()  # Raises an HTTPError for bad responses (4XX or 5XX)
    result = response.json()
    print("API Response:")
    print(json.dumps(result, indent=2))
except requests.exceptions.HTTPError as http_err:
    print(f"HTTP error occurred: {http_err} - {response.text}")
except Exception as err:
    print(f"Other error occurred: {err}")</code>
```

### Pricing

ByteDance Seed: Seed 2.1 Turbo API costs $1.5 per million tokens. Pay only for what you use with no minimum commitments. [View pricing plans](https://modelslab.com/pricing)

### Use Cases

- AI chatbots and virtual assistants
- Code generation and developer tools
- Content writing and copywriting automation
- Data analysis, summarization, and extraction

[Browse LLM Models](https://modelslab.com/models?feature=llmaster) [More from ByteDance Seed](https://modelslab.com/models/open_router) [View Pricing](https://modelslab.com/pricing)

ByteDance Seed: Seed 2.1 Turbo FAQ
---

### What is ByteDance Seed: Seed 2.1 Turbo?

Seed 2.1 Turbo is a multimodal model from ByteDance Seed for coding and long-horizon agent workflows. It is suited for end-to-end software delivery, multi-step task execution, and understanding visual and...

### How do I use the ByteDance Seed: Seed 2.1 Turbo API?

You can integrate ByteDance Seed: Seed 2.1 Turbo into your application with a single API call. Sign up on ModelsLab to get your API key, then use the model ID "bytedance-seed-seed-2-1-turbo" in your API requests. We provide SDKs for Python, JavaScript, and cURL examples in the API documentation.

### How much does ByteDance Seed: Seed 2.1 Turbo cost?

ByteDance Seed: Seed 2.1 Turbo costs $1.5 per million tokens. ModelsLab plans start at $21/month (Basic), and the $149/month Open Source plan includes unlimited generation on open-source models.

### What is the ByteDance Seed: Seed 2.1 Turbo model ID?

The model ID for ByteDance Seed: Seed 2.1 Turbo is "bytedance-seed-seed-2-1-turbo". Use this ID in your API requests to specify this model.

### Do I need a paid plan to use ByteDance Seed: Seed 2.1 Turbo?

Yes. ModelsLab is subscription-based with no free tier — plans start at $21/month (Basic, 3,250 API calls). The $149/month Open Source Unlimited plan includes unlimited generation across open-source models; premium third-party models are billed per call from your wallet.

---

*This markdown version is optimized for AI agents and LLMs.*

**Links:**
- [Website](https://modelslab.com)
- [API Documentation](https://docs.modelslab.com)
- [Blog](https://modelslab.com/blog)

---
*Generated by ModelsLab - 2026-08-15*