Cursor and Windsurf Run on Chinese AI Models

Americans: "Blah blah blah, Chinese AI models are soft power designed to dominate the world..."

American startups, meanwhile, champion freedom, innovation, and technological supremacy. Except for one small detail: their coding assistants increasingly run on... Chinese models.

Two high-profile American tools, Cursor and Windsurf, have reportedly integrated Chinese foundation models.

• Cursor's Composer sometimes reasons in simplified Chinese, a sign of fine-tuning on an Asian-origin model.
• Windsurf's SWE-1.5 is reportedly a derivative of Zhipu AI's GLM.

Nothing scandalous here: training a model from scratch costs tens of millions of dollars. Fine-tuning open-source models like Qwen or GLM is simply the most rational and often the highest-performing path.

The numbers speak for themselves:

• Qwen (Alibaba) dominates downloads on Hugging Face.
• Six of the ten most popular models are now Chinese.
• Performance (reasoning, coding, speed) matches or exceeds Llama 3.1 and Claude 3.5.
• And energy efficiency is often 2 to 8 times better.

In other words, Chinese open-source models have become a global infrastructure. The narrative of China "catching up" no longer holds.

We have entered a phase of convergence, where Western developers rely on Chinese building blocks to build their products.

It is no longer a question of origin, but of efficiency.

And that, for the global AI ecosystem, is a real turning point.