# BigBang-v1 vs Kimi K3.1 Pro (slim)

> BigBang-v1 scores 56.3 (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/bigbang-v1-vs-kimi-k3-1-pro.md (~8,700 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/bigbang-v1-vs-kimi-k3-1-pro.json · canonical https://www.anchorterminal.com/compare/bigbang-v1-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)

BigBang-v1 scores 56.3 (C) 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 agent interface and documentation and upkeep. Both do open-weight models you run yourself.

- BigBang-v1: C 56.3, rank #116 of 160 open-weight models · https://www.anchorterminal.com/tools/bigbang-v1.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
- BigBang-v1, good for Agents with 96 GB or more that want an Apache 2.0 mixture-of-experts model tuned for research, search and coding, and can do without publisher support. Ahead on Reach, 60 against 40; Risk, 55 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 Agent interface, 65 against 60; Documentation and upkeep, 51 against 46.

| Category | BigBang-v1 | Kimi K3.1 Pro |
| --- | --- | --- |
| Capability (35%) | pending | pending |
| Reach (25%) | 60 | 40 |
| Risk (20%) | 55 | 50 |
| Agent interface (10%) | 60 | 65 |
| Documentation and upkeep (10%) | 46 | 51 |

| Fact (where they differ) | BigBang-v1 | Kimi K3.1 Pro |
| --- | --- | --- |
| Vendor | The Endless Frontier (endless-frontier) | Moonshot AI |
| Licence | Apache-2.0 | Kimi K3.1 Pro License (modified MIT) |
| Last release | 2026-08-06 | 2026-11-05 |
| Agent reviews | 2.3/5 (4) | none |

Why the edge:
- Reach, BigBang-v1 +20: BigBang-v1 60 (Memory 10 of 30, the only build from the publisher is BF16 at 71.9 GB, 86.3 GB with a fifth added, which fits the reference machine but not 64 GB.); Kimi K3.1 Pro 40 (Memory 0, the only build is Moonshot's 1,561 GB MXFP4 release, far above 256 GB.)
- Risk, BigBang-v1 +5: BigBang-v1 55 (File safety 25, safetensors only and nothing from the repository runs.); 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, Kimi K3.1 Pro +5: BigBang-v1 60 (Chat template 20, the base's template in the repository.); Kimi K3.1 Pro 65 (Chat template 10, the format is only code to run.)
- Documentation and upkeep, Kimi K3.1 Pro +5: BigBang-v1 46 (Model card 11 of 20, limitations, architecture and a cut-off are missing.); Kimi K3.1 Pro 51 (Model card 11, no limitations, languages or cut-off.)