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Doubao Seed 1.8

doubaodoubao/doubao-seed-1-8

API guide

Chat completion

cURL
curl https://api.therouter.ai/v1/chat/completions \
  -H "Authorization: Bearer $THEROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"doubao/doubao-seed-1-8","messages":[{"role":"user","content":"η”¨δΈ­ζ–‡θ§£ι‡Š Seed 1.8 ηš„δΈ‰η§ζ€θ€ƒζ¨‘εΌγ€‚"}]}'

Tool use

Supports OpenAI-shape function calling. Strong Chinese instruction following makes it suitable for Chinese-language tool agents.

cURL
curl https://api.therouter.ai/v1/chat/completions \
  -H "Authorization: Bearer $THEROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "doubao/doubao-seed-1-8",
    "messages": [{"role": "user", "content": "δ»Šε€©εŒ—δΊ¬ε€©ζ°”ε¦‚δ½•οΌŸ"}],
    "tools": [{"type":"function","function":{"name":"get_weather","parameters":{"type":"object","properties":{"city":{"type":"string"}}}}}]
  }'
Fact ledger β€” every claim on this page traces here
sourceURLretrieved
Release dateseed.bytedance.com β†—2026-05-25verified
Architecturegithub.com β†—2026-05-25verified
Thinking modesseed.bytedance.com β†—2026-05-25verified
Training cutoffβ€”β€”unknown
Licensegithub.com β†—2026-05-25verified
BrowseComp-enseed.bytedance.com β†—2026-05-25verified
ZeroBenchseed.bytedance.com β†—2026-05-25to verify
VideoMMEseed.bytedance.com β†—2026-05-25to verify
WorldTravelseed.bytedance.com β†—2026-05-25to verify
ByteDance releases Seed1.8 general agentic modelseed.bytedance.com β†—2026-05-25verified
ByteDance launches Seed 2.0 family, superseding Seed 1.8volcengine.com β†—2026-05-25verified
Is Doubao Seed 1.8 multimodal?seed.bytedance.com β†—2026-05-25to verify
What are the three thinking modes in Seed 1.8?seed.bytedance.com β†—2026-05-25to verify
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