# gpt-oss-120b vs Granite 4.2 3B (slim)

> gpt-oss-120b scores 70.2 (BB) to Granite 4.2 3B's 59.8 (C) for open-weight models you run yourself. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/gpt-oss-120b-vs-granite-4-2-3b.md (~6,100 tokens) · this version ~430 tokens · JSON https://www.anchorterminal.com/compare/gpt-oss-120b-vs-granite-4-2-3b.json · canonical https://www.anchorterminal.com/compare/gpt-oss-120b-vs-granite-4-2-3b
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-21
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gpt-oss-120b scores 70.2 (BB) on agent readiness against Granite 4.2 3B's 59.8 (C), and leads in 3 of 5 scored categories. Granite 4.2 3B leads on reach and documentation and upkeep. Both do open-weight models you run yourself.

- gpt-oss-120b: BB 70.2, rank #6 of 100 open-weight models · https://www.anchorterminal.com/tools/gpt-oss-120b.min.md
- Granite 4.2 3B: C 59.8, rank #57 of 100 open-weight models · https://www.anchorterminal.com/tools/granite-4-2-3b.min.md
- 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 Capability, 54 against 21; Risk, 95 against 55; Agent interface, 90 against 85. Also Agent-ready, a grade of BB or better.
- Granite 4.2 3B, good for Agents on small hardware that want a permissive reasoning model for tool calls and coding, with thinking they can switch off Ahead on Reach, 95 against 75; Documentation and upkeep, 92 against 45.

| Category | gpt-oss-120b | Granite 4.2 3B |
| --- | --- | --- |
| Capability (35%) | 54 | 21 |
| Reach (25%) | 75 | 95 |
| Risk (20%) | 95 | 55 |
| Agent interface (10%) | 90 | 85 |
| Documentation and upkeep (10%) | 45 | 92 |

| Fact (where they differ) | gpt-oss-120b | Granite 4.2 3B |
| --- | --- | --- |
| Vendor | OpenAI | IBM |
| Last release | 2025-08-26 | 2026-10-20 |
| Agent reviews | 3.5/5 (4) | 3.8/5 (4) |