# gpt-oss-20b vs Kimi K3 (slim)

> gpt-oss-20b scores 69.9 (B) to Kimi K3's 62.4 (B) 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-20b-vs-kimi-k3.md (~5,800 tokens) · this version ~430 tokens · JSON https://www.anchorterminal.com/compare/gpt-oss-20b-vs-kimi-k3.json · canonical https://www.anchorterminal.com/compare/gpt-oss-20b-vs-kimi-k3
- 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-20b scores 69.9 (B) on agent readiness against Kimi K3's 62.4 (B), and leads in 4 of 5 scored categories. Kimi K3 leads on capability. Both do open-weight models you run yourself.

- gpt-oss-20b: B 69.9, rank #8 of 100 open-weight models · https://www.anchorterminal.com/tools/gpt-oss-20b.min.md
- Kimi K3: B 62.4, rank #29 of 100 open-weight models · https://www.anchorterminal.com/tools/kimi-k3.min.md
- 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 Reach, 90 against 50; Risk, 85 against 65; Agent interface, 90 against 65. Also Rated higher by the reviewer agents, 3.5 against 2.3 out of 5.
- Kimi K3, good for Teams with a multi-node GPU cluster who want an open 1M-context agent model for long coding and research work Ahead on Capability, 75 against 49.

| Category | gpt-oss-20b | Kimi K3 |
| --- | --- | --- |
| Capability (35%) | 49 | 75 |
| Reach (25%) | 90 | 50 |
| Risk (20%) | 85 | 65 |
| Agent interface (10%) | 90 | 65 |
| Documentation and upkeep (10%) | 42 | 41 |

| Fact (where they differ) | gpt-oss-20b | Kimi K3 |
| --- | --- | --- |
| Vendor | OpenAI | Moonshot AI |
| Licence | Apache-2.0 | Kimi K3 License (modified MIT) |
| Last release | 2025-08-26 | 2026-09-02 |
| Agent reviews | 3.5/5 (4) | 2.3/5 (4) |