metadata
license: cc-by-4.0
tags:
- owl-alpha
- longcat-2.0
- stealth-model
- stealthmark
- coding
- tool-use
- long-context
thumbnail: https://stealthmodels.com/owl-alpha/assets/owl-head-5.webp
new_version: meituan-longcat/LongCat-2.0
Owl Alpha was Meituan's LongCat-2.0: native tool use, a 1M-token context, and open weights under MIT.
By Stealth Models.
Facts as text
| Fact | Value |
|---|---|
| First seen | 28 Apr 2026 |
| Revealed | 29 Jun 2026 |
| Developer | Meituan |
| Context | 1,048,576 tokens |
| Input | Text |
| Tool calls | Yes, native |
| Speed in our tests | about 86 tok/s |
| Access | Stealth access ended; available as LongCat-2.0 |
Run it
The weights are open at meituan-longcat/LongCat-2.0 under MIT. With 1.6 trillion parameters it needs a multi-GPU server, and there's no GGUF yet.
Model guide · StealthMark leaderboard · Follow us
Text and images: CC BY 4.0, stealthmodels.com.