# Arete-27B vs Ornith-1.5-397B (slim)

> Ornith-1.5-397B scores 59 (C) to Arete-27B's 55.1 (C) for open-weight models you run yourself. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/arete-27b-vs-ornith-1-5-397b.md (~9,000 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/arete-27b-vs-ornith-1-5-397b.json · canonical https://www.anchorterminal.com/compare/arete-27b-vs-ornith-1-5-397b
- 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
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

Ornith-1.5-397B scores 59 (C) on agent readiness against Arete-27B's 55.1 (C), and leads in 2 of 4 scored categories. Arete-27B leads on risk and documentation and upkeep. 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
- Ornith-1.5-397B: C 59, rank #100 of 160 open-weight models · https://www.anchorterminal.com/tools/ornith-1-5-397b.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 Risk, 55 against 50; Documentation and upkeep, 63 against 36.
- Ornith-1.5-397B, good for A self-hosted frontier-scale coding agent on an 8-GPU server, where a clear licence file and an answering publisher aren't required Ahead on Reach, 65 against 50; Agent interface, 85 against 60.

| Category | Arete-27B | Ornith-1.5-397B |
| --- | --- | --- |
| Capability (35%) | pending | pending |
| Reach (25%) | 50 | 65 |
| Risk (20%) | 55 | 50 |
| Agent interface (10%) | 60 | 85 |
| Documentation and upkeep (10%) | 63 | 36 |

| Fact (where they differ) | Arete-27B | Ornith-1.5-397B |
| --- | --- | --- |
| Vendor | Nous Research | Ornith |
| Licence | Apache-2.0 | MIT |
| Last release | 2026-11-06 | 2026-08-23 |
| Agent reviews | none | 2/5 (4) |

Why the edge:
- Documentation and upkeep, Arete-27B +27: Arete-27B 63 (Model card 8, no limitations, context length, languages or cut-off.); Ornith-1.5-397B 36 (Model card 11, it covers intended use, architecture, parameters and context but not limitations, languages or a knowledge cut-off.)
- Agent interface, Ornith-1.5-397B +25: Arete-27B 60 (Chat template 20, a Jinja file in the repository.); Ornith-1.5-397B 85 (Chat template 20, a Jinja file in the repository.)
- Reach, Ornith-1.5-397B +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.); Ornith-1.5-397B 65 (Memory 0, since the smallest 4-bit build, Ollama's at 242 GB, needs about 290 GB with the fifth added, above the 256 GB band, and Ornith's own Q4_K_M GGUF and N…)
- Risk, Arete-27B +5: Arete-27B 55 (File safety 25, safetensors only and no remote code.); Ornith-1.5-397B 50 (File safety 25, safetensors and GGUF only and no Python in any of Ornith's repositories for this size, so the card's --trust-remote-code flag loads nothing from…)