> ## Documentation Index
> Fetch the complete documentation index at: https://docs.bytespike.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# doubao-seed-2.0-pro

> ByteDance's flagship Doubao Seed 2.0 Pro — vision, tools, long context. Strong on Chinese-language tasks, available through OpenAI Chat Completions.

`doubao-seed-2.0-pro` is the flagship of ByteDance's 豆包 (Doubao) family — strong on Chinese-language tasks, vision-capable, with a long context window.

**Pricing:** see the [rate card](/pricing).

## Protocols

| Protocol                | Path                                                |
| ----------------------- | --------------------------------------------------- |
| OpenAI Chat Completions | `POST https://llm.bytespike.ai/v1/chat/completions` |

## Quickstart

```bash theme={null}
curl https://llm.bytespike.ai/v1/chat/completions \
  -H "Authorization: Bearer $BYTESPIKE_API_KEY" \
  -H "content-type: application/json" \
  -d '{
    "model": "doubao-seed-2.0-pro",
    "messages": [{ "role": "user", "content": "Hello, ByteSpike." }]
  }'
```

## Capabilities

| Capability               | Supported   |
| ------------------------ | ----------- |
| Chat Completions         | ✅           |
| Streaming (SSE)          | ✅           |
| Tools / function calling | ✅           |
| JSON mode                | ✅           |
| Vision (image input)     | ✅           |
| Long context (200K+)     | ✅           |
| Context window           | 200K tokens |

## When to use

* **Chinese-language workloads** — Doubao's strongest dimension.
* **Vision tasks in CN region** — strong OCR + image understanding.
* **Long-context Chinese tasks** — 200K window for large documents.

## Next

* [glm-5.1](/models/glm-5) — Zhipu Chinese-LLM alternative