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Seed 2.1 Pro
ByteDance's flagship Seed/Doubao reasoning model, served on Volcano Engine and BytePlus ModelArk.
- ByteDance Seed
- Closed
- Released Jun 2026
Where it ranks
- –Chat & assistantsModels · Cloud · no result on this task’s benchmarks yet
- CCodingModels · Cloud · 1,520 on LMArena WebDev / Code Arena (overall)
Facts
- Vendor
- ByteDance Seed
- Family
- Seed
- Released
- Jun 2026
- Weights
- Closed: API and apps only
- Access
- Paid only
- Last verified
- 19 Oct 2026
Price from seed.bytedance.com, 19 Oct 2026.
Benchmark results
| Benchmark | Result | Entry on the leaderboard | As of | Source |
|---|---|---|---|---|
| LMArena WebDev / Code Arena (overall) | 1,520 | Seed2.1 Pro PreviewFrom LMArena's official leaderboard-dataset (webdev = Code Arena, split latest, category overall, published 2026-10-18), which mirrors https://arena.ai/leaderboard/webdev. Rank 53; 15037 votes; 95% CI 1514.1-1526.0. | 18 Oct 2026 | huggingface.co |
Where you can use it
- –DoubaoApps · Cloud
Earlier versions
- Seed 2.0 Pro · —