Seed 2.1 Pro (2026-09-15)

No priced offering is listed for this model yet.

Max thinking budget

256K

Family

seed-pro

Not stated on ByteDance Seed’s pages: built-in tools, knowledge cutoff, aliases.

This model isn’t on any leaderboard we cite yet.

1. Oct 14, 2026 New language model

• 模型列表 - 火山方舟 - 火山引擎in Chinese (opens in a new tab) docs.volcengine.com · checked Nov 11, 2026
• 模型发布公告 - 火山方舟 - 火山引擎in Chinese (opens in a new tab) docs.volcengine.com · checked Nov 6, 2026
• 模型支持的参数列表--火山方舟-火山引擎in Chinese (opens in a new tab) docs.volcengine.com · checked Nov 4, 2026
• 1M上下文+256k输出：Doubao-Seed-2.1-pro长文档处理与API接入完全指南in Chinese (opens in a new tab) volcengine.com · checked Nov 4, 2026

ByteDance Seed’s official policies: data use, privacy, terms →

Some values on this page are still waiting to be checked against official pages: a filled dot is verified, a hollow one is not yet (with or without a source on file). How we verify data

ByteDance Seed · China · seed.bytedance.com

Snapshots, the same family and other models from this provider

• Seed 2.1 Pro
• Seed 2.1 Pro (2026-06-28)
• Seed 2.0 Pro
• Seed 2.0 Pro (2026-02-15)
• seed-2-0-lite-260428 LTS
• Seed 2.1 Lite
• Seed 2.1 Lite (2026-09-15)
• Seed 2.1 Turbo