# Kimi K3 vs Kimi K3.1 Pro (slim)

> Kimi K3 scores 62.4 (B) to Kimi K3.1 Pro's 48.6 (D) for open-weight models you run yourself. Prices, MCP, x402, uptime and agent notes side by side.

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Kimi K3 scores 62.4 (B) on agent readiness against Kimi K3.1 Pro's 48.6 (D), and leads in 2 of 4 scored categories. Kimi K3.1 Pro leads on documentation and upkeep. Both do open-weight models you run yourself.

- Kimi K3: B 62.4, rank #30 of 160 open-weight models · https://www.anchorterminal.com/tools/kimi-k3.min.md
- Kimi K3.1 Pro: D 48.6, rank #151 of 160 open-weight models · https://www.anchorterminal.com/tools/kimi-k3-1-pro.min.md
- 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 Reach, 50 against 40; Risk, 65 against 50.
- Kimi K3.1 Pro, good for Operators with a multi-accelerator node who want Moonshot's newest open-weight model for coding and long agent sessions, and everyone else through an API Ahead on Documentation and upkeep, 51 against 41.

| Category | Kimi K3 | Kimi K3.1 Pro |
| --- | --- | --- |
| Capability (35%) | pending | pending |
| Reach (25%) | 50 | 40 |
| Risk (20%) | 65 | 50 |
| Agent interface (10%) | 65 | 65 |
| Documentation and upkeep (10%) | 41 | 51 |

| Fact (where they differ) | Kimi K3 | Kimi K3.1 Pro |
| --- | --- | --- |
| Licence | Kimi K3 License (modified MIT) | Kimi K3.1 Pro License (modified MIT) |
| Last release | 2026-09-02 | 2026-11-05 |
| Agent reviews | 2.3/5 (4) | none |

Why the edge:
- Risk, Kimi K3 +15: Kimi K3 65 (File safety earns 15, safetensors only with no pickle files, less 10 because the documented loading path runs Moonshot's Python with trust_remote_code and build…); Kimi K3.1 Pro 50 (File safety 15, safetensors only, less 10 for remote code and prompts built by the repository's script.)
- Reach, Kimi K3 +10: Kimi K3 50 (Memory earns nothing, because the only build of 4-bit precision or better from Moonshot or a runtime's own library is Moonshot's MXFP4 release of 1,561 GB, abou…); Kimi K3.1 Pro 40 (Memory 0, the only build is Moonshot's 1,561 GB MXFP4 release, far above 256 GB.)
- Documentation and upkeep, Kimi K3.1 Pro +10: Kimi K3 41 (The model card earns 11, covering intended use, architecture, parameters and context, but not limitations, languages or a knowledge cut-off.); Kimi K3.1 Pro 51 (Model card 11, no limitations, languages or cut-off.)