Updated daily at 05:00 UTC
- Released
- 1 Sep 2025
- Status
- Legacy
- Context
- 131.1K
- Max output
- —
- Input per 1M tokens
- —
- Output per 1M tokens
- —
- Open weights
- Yes
- License
- mit
- Parameters
- 560B, 27B active
- Knowledge cutoff
- —
- Reasoning
- No
- Modalities
- text → text
Category scores
Out of 100, from independent and third-party results only, by method category-2026-09-29.1.
| Category | Score | Rank | Coverage |
|---|---|---|---|
| Human preference | 50.2 | Not ranked | 1 of 5 |
Benchmark results
Every result we hold for this model, with who ran it and where it was published.
Human preference
| Benchmark | Metric | Value | Provenance | Setting | Evaluated | Source |
|---|---|---|---|---|---|---|
| Text Arena (arena.ai) | Arena score (Elo scale) | 1401 | Independent | — | 25 Sep 2026 | Arena |
| Text Arena (arena.ai) | Votes | 11119 | Independent | — | 25 Sep 2026 | Arena |
Other LongCat versions
- LongCat-2.5-Preview25 Sep 2026
- LongCat-2.030 Jun 2026
- LongCat-Flash-Lite5 Feb 2026
- LongCat-Flash-Thinking22 Sep 2025