Seed2.1
ByteDance · · 61 days after Seed3D 2.0
Partially verified
0 of 1 published values traced to a source2 primary sources, 1 archived3 not researched yet
Why this status
Cited to the lab's own announcement and official documentation. Not verified because the release date could not be found in any cited primary source — the value may be correct, but this dataset cannot yet show where it came from.
What these states mean · How records are judged · Has this record changed?
ByteDance's agent model for real-world productivity, and the flagship of the Seed line.
Details
| Released | June 23, 2026 |
|---|---|
| Company | ByteDance |
| Family | Seed |
| Lineage | after Seed2.0 |
| Era | Agentic systems |
| Type | Language model · LLM |
| Modalities | Not recorded |
| Capabilities | Not recorded |
| Weights | Proprietary |
| Licence | Not applicable — proprietary |
| Context window | Not researched |
| Parameters | Not researched |
Current information, elsewhere
This record is a historical one: every figure above is traced to a dated primary source. For what is true today — live pricing, current rankings, availability — these are better maintained than anything here could be.
- Current price and providers OpenRouter ↗
- Current benchmark scores Artificial Analysis ↗
Sources
Record status: partly verified · confidence 60/100 · 2 of 2 primary
Cited to the lab's own announcement and official documentation. Not verified because the release date could not be found in any cited primary source — the value may be correct, but this dataset cannot yet show where it came from.
- seed.bytedance.com Official announcement
- seed.bytedance.com Official documentation archived
Primary means published by the organisation that made the model. Verified records require at least one.
Seed family
- Seed2.0 February 14, 2026
- Seed2.1 June 23, 2026
What changed from Seed2.0
Compared with the previous release in this series. A field appears only when both records state a value — where one does not, it is listed as uncomparable rather than dropped, because a gap in our research is not a finding about the model.
Not comparable: Context window (not researched on both releases); Parameters (not researched on both releases); Capabilities and modalities (not researched on both releases)
Compare Seed2.1 with another model →
See Seed2.1 on the interactive timeline →