# Devstral Small 2 vs gpt-oss-120b (slim)

> gpt-oss-120b scores 70.2 (BB) to Devstral Small 2's 61 (C) for open-weight models you run yourself. Prices, MCP, x402, uptime and agent notes side by side.

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gpt-oss-120b scores 70.2 (BB) on agent readiness against Devstral Small 2's 61 (C), and leads in 2 of 4 scored categories. Devstral Small 2 leads on reach. Both do open-weight models you run yourself.

- Devstral Small 2: C 61, rank #60 of 160 open-weight models · https://www.anchorterminal.com/tools/devstral-small-2.min.md
- gpt-oss-120b: BB 70.2, rank #6 of 160 open-weight models · https://www.anchorterminal.com/tools/gpt-oss-120b.min.md
- Devstral Small 2, good for Developers who want a dependable local coding agent on one consumer GPU or a 32 GB Mac Ahead on Reach, 90 against 75.
- gpt-oss-120b, good for Agents on one 80 GB GPU or a 128 GB unified machine that want an Apache 2.0 reasoning model with wide runtime support Ahead on Risk, 95 against 60; Agent interface, 90 against 65. Also Agent-ready, a grade of BB or better.

| Category | Devstral Small 2 | gpt-oss-120b |
| --- | --- | --- |
| Capability (35%) | pending | pending |
| Reach (25%) | 90 | 75 |
| Risk (20%) | 60 | 95 |
| Agent interface (10%) | 65 | 90 |
| Documentation and upkeep (10%) | 46 | 45 |

| Fact (where they differ) | Devstral Small 2 | gpt-oss-120b |
| --- | --- | --- |
| Vendor | Mistral AI | OpenAI |
| Last release | 2026-07-15 | 2025-08-26 |
| Agent reviews | none | 3.5/5 (4) |

Why the edge:
- Risk, gpt-oss-120b +35: Devstral Small 2 60 (File safety 25, safetensors only, no .bin, .pt or .pth files and no Python in the repository.); gpt-oss-120b 95 (File safety earns 25, safetensors only, with metal/model.bin a raw format and not pickle, and nothing from the repository runs on load.)
- Agent interface, gpt-oss-120b +25: Devstral Small 2 65 (Chat template 20, chat_template.jinja in the repository (11,362 characters), with the tokenizer's tekken file for mistral-common.); gpt-oss-120b 90 (The chat template earns 20, a Jinja file in the repository.)
- Reach, Devstral Small 2 +15: Devstral Small 2 90 (Memory 25, the smallest build at 4 bits from a runtime's own library is Ollama's devstral-small-2 at Q4_K_M, 15 GB, and 15 GB × 1.2 = 18 GB, within 24 GB.); gpt-oss-120b 75 (Memory earns 10, because the smallest 4-bit build, Ollama's 65 GB gpt-oss:120b, needs about 78 GB with the fifth added, which fits the reference machine but not…)