# Arete-27B vs LongCat-2.5 (slim)

> Arete-27B scores 55.1 (C) to LongCat-2.5's 50.5 (D) for open-weight models you run yourself. Prices, MCP, x402, uptime and agent notes side by side.

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Arete-27B scores 55.1 (C) on agent readiness against LongCat-2.5's 50.5 (D), and leads in 2 of 4 scored categories. LongCat-2.5 leads on risk and agent interface. Both do open-weight models you run yourself.

- Arete-27B: C 55.1, rank #123 of 160 open-weight models · https://www.anchorterminal.com/tools/arete-27b.min.md
- LongCat-2.5: D 50.5, rank #145 of 160 open-weight models · https://www.anchorterminal.com/tools/longcat-2-5.min.md
- Arete-27B, good for Agents that want Qwen3.8-27B's coding and tool use without its handling of politically sensitive topics, on a 24 GB card or a 128 GB machine Ahead on Reach, 50 against 35; Documentation and upkeep, 63 against 46.
- LongCat-2.5, good for Operators with NPU clusters, and anyone tracking what the open flagships can do Ahead on Risk, 60 against 55; Agent interface, 75 against 60.

| Category | Arete-27B | LongCat-2.5 |
| --- | --- | --- |
| Capability (35%) | pending | pending |
| Reach (25%) | 50 | 35 |
| Risk (20%) | 55 | 60 |
| Agent interface (10%) | 60 | 75 |
| Documentation and upkeep (10%) | 63 | 46 |

| Fact (where they differ) | Arete-27B | LongCat-2.5 |
| --- | --- | --- |
| Vendor | Nous Research | Meituan (LongCat) |
| Licence | Apache-2.0 | MIT |
| Last release | 2026-11-06 | 2026-11-10 |
| Terms last updated | no document linked | not read yet |

Why the edge:
- Documentation and upkeep, Arete-27B +17: Arete-27B 63 (Model card 8, no limitations, context length, languages or cut-off.); LongCat-2.5 46 (Model card 11, Intended use, limitations (the usage considerations), the architecture and the parameter counts are on the card.)
- Reach, Arete-27B +15: Arete-27B 50 (Memory 10, the only build from Nous Research is the 54.7 GB BF16 release, which needs about 66 GB and fits the reference machine.); LongCat-2.5 35 (Memory 0, the smallest build is Meituan's W4A4 repository, 1,336 GB, and 1,336 GB × 1.2 = 1,603 GB, far above 256 GB.)
- Agent interface, LongCat-2.5 +15: Arete-27B 60 (Chat template 20, a Jinja file in the repository.); LongCat-2.5 75 (Chat template 20, chat_template.jinja in the repository (11,823 characters), with a copy in tokenizer_config.json.)
- Risk, LongCat-2.5 +5: Arete-27B 55 (File safety 25, safetensors only and no remote code.); LongCat-2.5 60 (File safety 25, safetensors only, no .bin, .pt or .pth files and no Python in the repository.)