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| 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 |
| --- |
| |
| <a href="https://stealthmodels.com/owl-alpha/?utm_source=huggingface&utm_medium=referral&utm_campaign=owl-alpha-card"><img src="https://huggingface.co/stealth-model/owl-alpha/resolve/main/panels/hero.webp" alt="A cloaked owl raises her head. Owl Alpha. Revealed: LongCat-2.0 by Meituan. You have my attention."></a> |
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| **Owl Alpha was Meituan's LongCat-2.0: native tool use, a 1M-token context, and open weights under MIT.** |
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| By [Stealth Models](https://stealthmodels.com/?utm_source=huggingface&utm_medium=referral&utm_campaign=owl-alpha-card). |
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| <a href="https://stealthmodels.com/benchmarks/models/owl-alpha?utm_source=huggingface&utm_medium=referral&utm_campaign=owl-alpha-card"><img src="https://huggingface.co/stealth-model/owl-alpha/resolve/main/panels/verdict.webp" alt="StealthMark 1.8.8 results for Owl Alpha (LongCat-2.0): benchmark score 25.5 out of 100, General Intelligence 17.2, Visual Intelligence 34.4. Strongest at turning a brief into an original character: 61.6 on Selfie."></a> |
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| <a href="https://stealthmodels.com/benchmarks/models/owl-alpha?utm_source=huggingface&utm_medium=referral&utm_campaign=owl-alpha-card"><img src="https://huggingface.co/stealth-model/owl-alpha/resolve/main/panels/results.webp" alt="Every StealthMark result of Owl Alpha (LongCat-2.0): Selfie 61.6, Beach 54.4, Raccoon 42.6, Newton's Mirror 23.1, Ground Truth 12.9, Mona Lisa 4.1. Not tested yet: Foresight, Latch."></a> |
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| [See what it was built for](https://stealthmodels.com/owl-alpha?utm_source=huggingface&utm_medium=referral&utm_campaign=owl-alpha-card#work) |
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| <a href="https://stealthmodels.com/owl-alpha/?utm_source=huggingface&utm_medium=referral&utm_campaign=owl-alpha-card"><img src="https://huggingface.co/stealth-model/owl-alpha/resolve/main/panels/case.webp" alt="The case file. 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. 28 Apr 2026: Appears with free access, a 1M-token context and no developer’s name. 29 Jun 2026: Meituan names LongCat-2.0 as the model behind Owl Alpha. 12 Jul 2026: The LongCat-2.0 weights follow under the MIT license."></a> |
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| [See how it was revealed](https://stealthmodels.com/owl-alpha?utm_source=huggingface&utm_medium=referral&utm_campaign=owl-alpha-card#clue-reveal) |
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| <details><summary>Facts as text</summary> |
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| | 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 | |
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| </details> |
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| ## Run it |
| The weights are open at [meituan-longcat/LongCat-2.0](https://huggingface.co/meituan-longcat/LongCat-2.0) under MIT. With 1.6 trillion parameters it needs a multi-GPU server, and there's no GGUF yet. |
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| [Model guide](https://stealthmodels.com/owl-alpha/?utm_source=huggingface&utm_medium=referral&utm_campaign=owl-alpha-card) · [StealthMark leaderboard](https://huggingface.co/spaces/stealth-model/stealthmark) · [Follow us](https://huggingface.co/stealth-model)<br> |
| Text and images: CC BY 4.0, stealthmodels.com. |
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