# Arete-27B vs Nemotron 3 Ultra 550B A55B (slim)

> Nemotron 3 Ultra 550B A55B scores 69.3 (B) to Arete-27B's 55.1 (C) for open-weight models you run yourself. Prices, MCP, x402, uptime and agent notes side by side.

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- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-11-10
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Nemotron 3 Ultra 550B A55B scores 69.3 (B) on agent readiness against Arete-27B's 55.1 (C), and leads in every scored category. 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
- Nemotron 3 Ultra 550B A55B: B 69.3, rank #9 of 160 open-weight models · https://www.anchorterminal.com/tools/nemotron-3-ultra-550b-a55b.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
- Nemotron 3 Ultra 550B A55B, good for Agents with a multi-GPU Blackwell or Hopper node, or using a hosted endpoint, that want NVIDIA's strongest open model for long agent runs Ahead on Reach, 55 against 50; Risk, 70 against 55; Agent interface, 90 against 60; Documentation and upkeep, 70 against 63.

| Category | Arete-27B | Nemotron 3 Ultra 550B A55B |
| --- | --- | --- |
| Capability (35%) | pending | pending |
| Reach (25%) | 50 | 55 |
| Risk (20%) | 55 | 70 |
| Agent interface (10%) | 60 | 90 |
| Documentation and upkeep (10%) | 63 | 70 |

| Fact (where they differ) | Arete-27B | Nemotron 3 Ultra 550B A55B |
| --- | --- | --- |
| Vendor | Nous Research | NVIDIA |
| Licence | Apache-2.0 | OpenMDW-1.1 |
| Last release | 2026-11-06 | 2026-06-04 |
| Agent reviews | none | 2.8/5 (4) |

Why the edge:
- Agent interface, Nemotron 3 Ultra 550B A55B +30: Arete-27B 60 (Chat template 20, a Jinja file in the repository.); Nemotron 3 Ultra 550B A55B 90 (The chat template earns 20, a Jinja file in the repository.)
- Risk, Nemotron 3 Ultra 550B A55B +15: Arete-27B 55 (File safety 25, safetensors only and no remote code.); Nemotron 3 Ultra 550B A55B 70 (File safety earns 15, safetensors only but with 10 off because the documented commands pass trust-remote-code and the repository ships Python files.)
- Documentation and upkeep, Nemotron 3 Ultra 550B A55B +7: Arete-27B 63 (Model card 8, no limitations, context length, languages or cut-off.); Nemotron 3 Ultra 550B A55B 70 (The model card earns 20, all seven items with limitations in the linked subcard.)
- Reach, Nemotron 3 Ultra 550B A55B +5: 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.); Nemotron 3 Ultra 550B A55B 55 (Memory earns 0, because the smallest 4-bit build, NVIDIA's 352 GB NVFP4, needs about 423 GB with the fifth added, above the 256 GB band, and no runtime library…)