According to Together AI's CEO, China's leadership in open-source AI is a function of market structure, not a philosophical preference. The market is organized around open models, with companies competing by building APIs and applications on top, creating a different game-theoretic equilibrium than the closed-model US market.

While US firms lead in cutting-edge AI, the impressive quality of open-source models from China is compressing the market. As these free models improve, more tasks become "good enough" for open source, creating significant pricing pressure on premium, closed-source foundation models from companies like OpenAI and Google.

Unlike the largely closed-source US market, DeepSeek's open-source models spurred intense competition among Chinese tech giants and startups to release their own open offerings. This has made Chinese open-source models the most used globally by token count, creating a distinct competitive dynamic.

The rise of Chinese AI models like DeepSeek and Kimmy in 2025 was driven by the startup and developer communities, not large enterprises. This bottom-up adoption pattern is reshaping the open-source landscape, creating a new competitive dynamic where nimble startups are leveraging these models long before they are vetted by corporate buyers.

The performance gap between US and Chinese AI has closed, establishing them as co-leaders. A key divergence is China's embrace of open models, while major US players have shifted to closed, proprietary systems. This creates a significant geopolitical and technological divide in the global AI ecosystem.

A common misconception is that Chinese AI is fully open-source. The reality is they are often "open-weight," meaning training parameters (weights) are shared, but the underlying code and proprietary datasets are not. This provides a competitive advantage by enabling adoption while maintaining some control.

In the vacuum left by banned US frontier models, Chinese labs are releasing powerful and cost-effective open-source alternatives like ZAI's GLM 5.2. These models are proving competitive on valuable, complex tasks like UI design and coding, but at a fraction of the cost.

Despite leading in frontier models and hardware, the US is falling behind in the crucial open-source AI space. Practitioners like Sourcegraph's CTO find that Chinese open-weight models are superior for building AI agents, creating a growing dependency for application builders.

The United States lacks a coherent national strategy for open-source AI, while China is rapidly producing high-quality models. This has created a situation where American companies are increasingly turning to Chinese-developed models to make their AI pipelines more efficient and competitive.