# Kimi K3.1 Pro vs Nanbeige4.2-3B (slim)

> Nanbeige4.2-3B scores 61 (C) 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-nanbeige-4-2-3b.md (~9,450 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/kimi-k3-1-pro-vs-nanbeige-4-2-3b.json · canonical https://www.anchorterminal.com/compare/kimi-k3-1-pro-vs-nanbeige-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: 2026-11-10
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

Nanbeige4.2-3B scores 61 (C) on agent readiness against Kimi K3.1 Pro's 48.6 (D), and leads in every scored category. 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
- Nanbeige4.2-3B: C 61, rank #78 of 160 open-weight models · https://www.anchorterminal.com/tools/nanbeige-4-2-3b.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
- Nanbeige4.2-3B, good for Local agents that need tool calling and a long context on a laptop or a small GPU Ahead on Reach, 85 against 40; Risk, 55 against 50; Agent interface, 85 against 65; Documentation and upkeep, 72 against 51.

| Category | Kimi K3.1 Pro | Nanbeige4.2-3B |
| --- | --- | --- |
| Capability (35%) | pending | pending |
| Reach (25%) | 40 | 85 |
| Risk (20%) | 50 | 55 |
| Agent interface (10%) | 65 | 85 |
| Documentation and upkeep (10%) | 51 | 72 |

| Fact (where they differ) | Kimi K3.1 Pro | Nanbeige4.2-3B |
| --- | --- | --- |
| Vendor | Moonshot AI | Nanbeige LLM Lab (BOSS Zhipin) |
| Licence | Kimi K3.1 Pro License (modified MIT) | Apache-2.0 (Hub metadata only; the repository has no LICENSE file) |
| Last release | 2026-11-05 | 2026-09-11 |

Why the edge:
- Reach, Nanbeige4.2-3B +45: Kimi K3.1 Pro 40 (Memory 0, the only build is Moonshot's 1,561 GB MXFP4 release, far above 256 GB.); Nanbeige4.2-3B 85 (Memory 30, the smallest build from Nanbeige is the FP8 repository (the 8-bit GPTQ one is the same size), 5.19 GB, and 5.19 GB × 1.2 = 6.2 GB, within 16 GB.)
- Documentation and upkeep, Nanbeige4.2-3B +21: Kimi K3.1 Pro 51 (Model card 11, no limitations, languages or cut-off.); Nanbeige4.2-3B 72 (Model card 17, Intended use, limitations, the architecture, the parameters (3B outside the embeddings), the context and the languages (in the metadata) are on t…)
- Agent interface, Nanbeige4.2-3B +20: Kimi K3.1 Pro 65 (Chat template 10, the format is only code to run.); Nanbeige4.2-3B 85 (Chat template 20, A Jinja chat template in tokenizer_config.json (7,961 characters), with enable_thinking, preserve_thinking, tools and tool_call_format switche…)
- Risk, Nanbeige4.2-3B +5: Kimi K3.1 Pro 50 (File safety 15, safetensors only, less 10 for remote code and prompts built by the repository's script.); Nanbeige4.2-3B 55 (File safety 15, safetensors only, no .bin, .pt or .pth files (25).)