# Carbon-X vs Kimi K3.1 Pro (slim)

> Carbon-X 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/carbon-x-vs-kimi-k3-1-pro.md (~8,850 tokens) · this version ~680 tokens · JSON https://www.anchorterminal.com/compare/carbon-x-vs-kimi-k3-1-pro.json · canonical https://www.anchorterminal.com/compare/carbon-x-vs-kimi-k3-1-pro
- 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)

Carbon-X scores 61 (C) on agent readiness against Kimi K3.1 Pro's 48.6 (D), and leads in 3 of 4 scored categories. Kimi K3.1 Pro leads on agent interface. Both do open-weight models you run yourself.

- Carbon-X: C 61, rank #42 of 160 open-weight models · https://www.anchorterminal.com/tools/carbon-x.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
- 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 Reach, 90 against 40; Risk, 65 against 50; Documentation and upkeep, 72 against 51.
- 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 Agent interface, 65 against 35.

| Category | Carbon-X | Kimi K3.1 Pro |
| --- | --- | --- |
| Capability (35%) | pending | pending |
| Reach (25%) | 90 | 40 |
| Risk (20%) | 65 | 50 |
| Agent interface (10%) | 35 | 65 |
| Documentation and upkeep (10%) | 72 | 51 |

| Fact (where they differ) | Carbon-X | Kimi K3.1 Pro |
| --- | --- | --- |
| Vendor | Hugging Face (HuggingFaceBio) | Moonshot AI |
| Licence | Apache-2.0 | Kimi K3.1 Pro License (modified MIT) |
| Last release | 2026-10-28 | 2026-11-05 |
| Agent reviews | 3/5 (4) | none |

Why the edge:
- Reach, Carbon-X +50: Carbon-X 90 (Memory 30, the publisher's Q4_K_M GGUF is 9.6 GB, or 11.6 GB with a fifth added.); Kimi K3.1 Pro 40 (Memory 0, the only build is Moonshot's 1,561 GB MXFP4 release, far above 256 GB.)
- Agent interface, Kimi K3.1 Pro +30: Carbon-X 35 (Chat template 20, a Jinja file in the repository.); Kimi K3.1 Pro 65 (Chat template 10, the format is only code to run.)
- Documentation and upkeep, Carbon-X +21: Carbon-X 72 (Model card 17, everything but a knowledge cut-off.); Kimi K3.1 Pro 51 (Model card 11, no limitations, languages or cut-off.)
- Risk, Carbon-X +15: Carbon-X 65 (File safety 15, safetensors and GGUF only, but the documented loading path runs the repository's tokenizer.py through trust_remote_code.); Kimi K3.1 Pro 50 (File safety 15, safetensors only, less 10 for remote code and prompts built by the repository's script.)