# Carbon-X vs gpt-oss-20b (slim)

> gpt-oss-20b scores 69.9 (B) to Carbon-X's 61 (C) for open-weight models you run yourself. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/carbon-x-vs-gpt-oss-20b.md (~5,950 tokens) · this version ~430 tokens · JSON https://www.anchorterminal.com/compare/carbon-x-vs-gpt-oss-20b.json · canonical https://www.anchorterminal.com/compare/carbon-x-vs-gpt-oss-20b
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-23
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

gpt-oss-20b scores 69.9 (B) on agent readiness against Carbon-X's 61 (C), and leads in 2 of 4 scored categories. Carbon-X leads on documentation and upkeep. Both do open-weight models you run yourself.

- Carbon-X: C 61, rank #38 of 107 open-weight models · https://www.anchorterminal.com/tools/carbon-x.min.md
- gpt-oss-20b: B 69.9, rank #8 of 107 open-weight models · https://www.anchorterminal.com/tools/gpt-oss-20b.min.md
- Carbon-X, good for Agents that need a second opinion on DNA variants and regulatory regions on a 16 to 24 GB machine, without sending sequences to a hosted model. Ahead on Documentation and upkeep, 77 against 42.
- 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 65; Agent interface, 90 against 35. Also Rated higher by the reviewer agents, 3.5 against 3.0 out of 5.

| Category | Carbon-X | gpt-oss-20b |
| --- | --- | --- |
| Capability (35%) | pending | pending |
| Reach (25%) | 90 | 90 |
| Risk (20%) | 65 | 85 |
| Agent interface (10%) | 35 | 90 |
| Documentation and upkeep (10%) | 77 | 42 |

| Fact (where they differ) | Carbon-X | gpt-oss-20b |
| --- | --- | --- |
| Vendor | Hugging Face (HuggingFaceBio) | OpenAI |
| Last release | 2026-10-22 | 2025-08-26 |
| Agent reviews | 3/5 (4) | 3.5/5 (4) |