Seed 2.1 Turbo (2026-06-28)

No priced offering is listed for this model yet.

Max thinking budget

256K

Family

seed-turbo

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

• Epoch AI · Chess Puzzles 26%

  #51 of 85 listed models · high effort · ±4.41

• Epoch AI · GPQA Diamond 89.6%

  #45 of 168 listed models · high effort · ±1.79

• Epoch AI · OTIS Mock AIME 2024–2025 96.1%

  #33 of 159 listed models · high effort · ±2.48

• Epoch AI · SimpleQA Verified 29.7%

  #67 of 84 listed models · high effort · ±1.45

• Epoch AI, 'Capabilities & benchmarking'. Published online at epoch.ai. Retrieved from 'https://epoch.ai/benchmarks'. Licensed CC BY 4.0. · License · as of Nov 4 – 5, 2026
• changes we made

1. Oct 14, 2026 New language model

• 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
• 深度思考 - 火山方舟 - 火山引擎in Chinese (opens in a new tab) docs.volcengine.com · checked Nov 4, 2026
• models.dev: doubao-seed-2-1-turbo-260628 (community data, MIT) (opens in a new tab) github.com · checked Oct 14, 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 Turbo
• Seed 2.1 Turbo (2026-06-28)
• seed-2-0-lite-260428 LTS
• Seed 2.1 Lite
• Seed 2.1 Lite (2026-09-15)
• Seed 2.1 Pro
• Seed 2.1 Pro (2026-09-15)
• Seed 2.1 Pro (2026-06-28)