# Devstral Small 2 vs gpt-oss-20b (slim)

> gpt-oss-20b scores 69.9 (B) 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-20b scores 69.9 (B) on agent readiness against Devstral Small 2's 61 (C), and leads in 2 of 4 scored categories. 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-20b: B 69.9, rank #8 of 160 open-weight models · https://www.anchorterminal.com/tools/gpt-oss-20b.min.md
- Devstral Small 2, good for Developers who want a dependable local coding agent on one consumer GPU or a 32 GB Mac
- gpt-oss-20b, good for Local agents on a 24 GB GPU or Mac that want a permissive licence, wide runtime support and documented structured output, one tool call at a time Ahead on Risk, 85 against 60; Agent interface, 90 against 65.

| Category | Devstral Small 2 | gpt-oss-20b |
| --- | --- | --- |
| Capability (35%) | pending | pending |
| Reach (25%) | 90 | 90 |
| Risk (20%) | 60 | 85 |
| Agent interface (10%) | 65 | 90 |
| Documentation and upkeep (10%) | 46 | 42 |

| Fact (where they differ) | Devstral Small 2 | gpt-oss-20b |
| --- | --- | --- |
| 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-20b +25: Devstral Small 2 60 (File safety 25, safetensors only, no .bin, .pt or .pth files and no Python in the repository.); gpt-oss-20b 85 (File safety earns 25, since the weights are safetensors and metal/model.bin is OpenAI's own raw Metal format rather than pickle, and nothing in the repository r…)
- Agent interface, gpt-oss-20b +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-20b 90 (The chat template earns 20, a Jinja file in the repository.)