doubao-seed-2.0-pro - ByteSpike

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.

Protocols

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

Quickstart

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 — Zhipu Chinese-LLM alternative