Seed 2.1 Turbo (Reasoning)
by ByteDance
Seed 2.1 Turbo (Reasoning) is a reasoning model from ByteDance, released on June 24, 2026. It ranks #39 of 220 models by Intelligence Score with a score of 42.7.
ByteDance's low-cost, low-latency next-generation agent model for large-scale production. A deep-thinking model with the full feature set of Seed 2.1 Pro and comparable performance, it is designed for enterprise-grade deployments handling high volumes of online calls across coding, long-chain agents, and multimodal tasks. Served via Volcano Engine as Doubao-Seed-2.1-turbo.
Key specs
| Provider | ByteDance |
|---|---|
| Release date | 2026-06-24 |
| License | proprietary |
| Intelligence Score | 42.7 |
| Coding index | 29.8 |
Quick answers
Is Seed 2.1 Turbo (Reasoning) open source?
No. Seed 2.1 Turbo (Reasoning) is a proprietary model from ByteDance (proprietary license).
When was Seed 2.1 Turbo (Reasoning) released?
ByteDance released Seed 2.1 Turbo (Reasoning) on June 24, 2026.
How does Seed 2.1 Turbo (Reasoning) compare to Claude Opus 5.5 (Reasoning)?
Seed 2.1 Turbo (Reasoning) scores 42.7 on the Intelligence Score versus 60.5 for Claude Opus 5.5 (Reasoning), the current #1.
Compare on the AI leaderboard · All AI models
More models from ByteDance
- Seed 2.1 Pro (Reasoning) — ByteDance
- Seed 2.0 Pro — ByteDance
- Seed 1.8 (Reasoning) — ByteDance
- Seed 2.0 Lite — ByteDance
- Seed 2.0 Mini (Reasoning) — ByteDance
- Seed 2.0 Code (Reasoning) — ByteDance