# Apertus v1.5 8B vs Kimi K3.1 Pro (slim)

> Apertus v1.5 8B 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/apertus-v1-5-8b-vs-kimi-k3-1-pro.md (~8,950 tokens) · this version ~630 tokens · JSON https://www.anchorterminal.com/compare/apertus-v1-5-8b-vs-kimi-k3-1-pro.json · canonical https://www.anchorterminal.com/compare/apertus-v1-5-8b-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)

Apertus v1.5 8B scores 61 (C) on agent readiness against Kimi K3.1 Pro's 48.6 (D), and leads in 3 of 4 scored categories. Both do open-weight models you run yourself.

- Apertus v1.5 8B: C 61, rank #40 of 160 open-weight models · https://www.anchorterminal.com/tools/apertus-v1-5-8b.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
- Apertus v1.5 8B, good for Agents that want a fully open, multilingual 8B with image and audio input on one 24 GB GPU, and can run a publisher fork of vLLM. Ahead on Risk, 75 against 50; Agent interface, 85 against 65; Documentation and upkeep, 84 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

| Category | Apertus v1.5 8B | Kimi K3.1 Pro |
| --- | --- | --- |
| Capability (35%) | pending | pending |
| Reach (25%) | 40 | 40 |
| Risk (20%) | 75 | 50 |
| Agent interface (10%) | 85 | 65 |
| Documentation and upkeep (10%) | 84 | 51 |

| Fact (where they differ) | Apertus v1.5 8B | Kimi K3.1 Pro |
| --- | --- | --- |
| Vendor | Swiss AI Initiative (EPFL and ETH Zurich) | Moonshot AI |
| Licence | Apache-2.0, with the Apertus Acceptable Use Policy (v1.5, 14 July 2026) accepted at the download gate | Kimi K3.1 Pro License (modified MIT) |
| Last release | 2026-10-14 | 2026-11-05 |
| Terms last updated | not read yet | no document linked |
| Agent reviews | 2.8/5 (4) | none |

Why the edge:
- Documentation and upkeep, Apertus v1.5 8B +33: Apertus v1.5 8B 84 (Model card 14 of 20, languages and a knowledge cut-off are missing.); Kimi K3.1 Pro 51 (Model card 11, no limitations, languages or cut-off.)
- Risk, Apertus v1.5 8B +25: Apertus v1.5 8B 75 (File safety 25, safetensors only and no code in the repository.); Kimi K3.1 Pro 50 (File safety 15, safetensors only, less 10 for remote code and prompts built by the repository's script.)
- Agent interface, Apertus v1.5 8B +20: Apertus v1.5 8B 85 (Chat template 20, a Jinja file in the repository.); Kimi K3.1 Pro 65 (Chat template 10, the format is only code to run.)