# Kimi K3.1 Pro vs LongCat-2.5 (slim)

> LongCat-2.5 scores 50.5 (D) 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.

- Full: https://www.anchorterminal.com/compare/kimi-k3-1-pro-vs-longcat-2-5.md (~9,200 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/kimi-k3-1-pro-vs-longcat-2-5.json · canonical https://www.anchorterminal.com/compare/kimi-k3-1-pro-vs-longcat-2-5
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-11-10
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

LongCat-2.5 scores 50.5 (D) 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 reach and documentation and upkeep. Both do open-weight models you run yourself.

- 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
- LongCat-2.5: D 50.5, rank #145 of 160 open-weight models · https://www.anchorterminal.com/tools/longcat-2-5.min.md
- 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 Reach, 40 against 35; Documentation and upkeep, 51 against 46.
- LongCat-2.5, good for Operators with NPU clusters, and anyone tracking what the open flagships can do Ahead on Risk, 60 against 50; Agent interface, 75 against 65.

| Category | Kimi K3.1 Pro | LongCat-2.5 |
| --- | --- | --- |
| Capability (35%) | pending | pending |
| Reach (25%) | 40 | 35 |
| Risk (20%) | 50 | 60 |
| Agent interface (10%) | 65 | 75 |
| Documentation and upkeep (10%) | 51 | 46 |

| Fact (where they differ) | Kimi K3.1 Pro | LongCat-2.5 |
| --- | --- | --- |
| Vendor | Moonshot AI | Meituan (LongCat) |
| Licence | Kimi K3.1 Pro License (modified MIT) | MIT |
| Last release | 2026-11-05 | 2026-11-10 |
| Terms last updated | no document linked | not read yet |

Why the edge:
- Risk, LongCat-2.5 +10: Kimi K3.1 Pro 50 (File safety 15, safetensors only, less 10 for remote code and prompts built by the repository's script.); LongCat-2.5 60 (File safety 25, safetensors only, no .bin, .pt or .pth files and no Python in the repository.)
- Agent interface, LongCat-2.5 +10: Kimi K3.1 Pro 65 (Chat template 10, the format is only code to run.); LongCat-2.5 75 (Chat template 20, chat_template.jinja in the repository (11,823 characters), with a copy in tokenizer_config.json.)
- Reach, Kimi K3.1 Pro +5: Kimi K3.1 Pro 40 (Memory 0, the only build is Moonshot's 1,561 GB MXFP4 release, far above 256 GB.); LongCat-2.5 35 (Memory 0, the smallest build is Meituan's W4A4 repository, 1,336 GB, and 1,336 GB × 1.2 = 1,603 GB, far above 256 GB.)
- Documentation and upkeep, Kimi K3.1 Pro +5: Kimi K3.1 Pro 51 (Model card 11, no limitations, languages or cut-off.); LongCat-2.5 46 (Model card 11, Intended use, limitations (the usage considerations), the architecture and the parameter counts are on the card.)