⌘K

Change language Switch ThemeSign In

Narrow Mode

Cursor Official Response to Open-Source Base Model Controversy: Admits Using Open-Source but Emphasizes Independent Training

Cursor Official Response to Open-Source Base Model Controversy: Admits Using Open-Source but Emphasizes Independent Training

@dotey

Cursor 回应：承认用了开源基座舆论发酵后，Cursor 开发者体验副总裁 Lee Robinson 在 X 上做出了官方回应。 x.com/leerob/status/…

他承认 Composer 2 确实基于一个开源基座模型构建，但强调最终模型只有约四分之一的算力来自基座，其余都是 Cursor 自己的训练。

他还表示 Cursor 正在通过推理合作伙伴的条款遵守许可证，并称未来会做完全自主的预训练。

这个回应有几个值得注意的地方。

第一，Lee Robinson 全程没有提"Kimi K2.5"这个名字，只说了"开源基座"。

第二，"四分之一算力来自基座"这个说法很巧妙，把外界"拿了别人的模型换个壳"的指控转化成了一个算力比例问题。

第三，"通过推理合作伙伴条款遵守许可证"这句话很模糊，并没有解释 Cursor 的界面上为什么看不到任何 Kimi K2.5 的标识，而这正是许可证条款明确要求的。Show More

!Image 3: Lee Robinson

#### Lee Robinson

@leerob · 19h ago

Yep, Composer 2 started from an open-source base! We will do full pretraining in the future.

Only ~1/4 of the compute spent on the final model came from the base, the rest is from our training. This is why evals are very different.

And yes, we are following the license through our inference partner terms.Show More

343

179

2,610

1.2M

Mar 20, 2026, 5:09 PM View on X

4 Replies

1 Retweets

24 Likes

7,806 Views  宝玉 @dotey

One Sentence Summary

Cursor's VP of Developer Experience Lee Robinson responds to open-source base controversy, acknowledging ~1/4 of compute comes from base, but not explicitly mentioning Kimi K2.5, nor explaining the licensing identification issue.

Summary

This tweet provides an analytical interpretation of Cursor's official response. Lee Robinson acknowledged that Composer 2 was built on an open-source base model, but emphasized that only about one-quarter of the compute for the final model came from the base, with the rest from Cursor's own training. The author points out three noteworthy issues: 1. Throughout, he never mentioned 'Kimi K2.5,' only referring to an 'open-source base'; 2. He cleverly reframed the accusation of 'rebranding someone else's model' into a compute ratio issue; 3. The licensing identification issue was not clearly explained. The tweet offers a critical analysis of the official response, revealing the ambiguities in it.

AI Score

78

Influence Score 5

Published At Yesterday

Language

Chinese

Tags

Cursor

Open-Source Model

AI Programming Tools

License Controversy

Lee Robinson HomeArticlesPodcastsVideosTweets

Cursor Official Response to Open-Source Base Model Contro...