Moonshot AI suspends Kimi K3 subscriptions after demand surge, plans $30B IPO

Moonshot AI's open-source Kimi K3 model overwhelmed servers within days of launch, forcing a subscription pause as the Beijing startup prepares for a Hong Kong IPO at a $30 billion valuation.

This article was drafted with AI assistance from multiple sources and was reviewed and approved by a human editor before publication.

Moonshot AI released Kimi K3 on July 17, 2026, an open-source large language model with 2.8 trillion parameters that the company claims is the world's largest open-source AI system. Within days, demand surged so dramatically that Moonshot had to halt new subscriptions.

In a post on X on July 20, Moonshot said that over the previous 48 hours, usage had pushed close to capacity limits. The company is now prioritizing existing subscribers and will reopen new subscription slots in batches as it adds capacity.

Lian Jye Su, chief analyst at Omdia, said the subscription suspension indicates that Moonshot does not have enough compute chips to handle the demand spike. The capacity crunch comes as Moonshot, based in Beijing and backed by Alibaba, is preparing for an initial public offering in Hong Kong within about six months, targeting a valuation of $30 billion, according to a Bloomberg report from July 19. One year ago, the company was valued at $4 billion in a funding round.

Moonshot will release the full model weights for Kimi K3 on July 27. The model is free and open-source, allowing customers to run it on their own hardware. After its public release, Kimi K3 topped the front-end coding capability chart on the Arena evaluation platform.

Moonshot is not alone in pushing the boundaries of open-source AI. Alibaba previewed Qwen3.8 over the weekend of July 18-19, a model with 2.4 trillion parameters. Alibaba claims Qwen3.8 is "second only to Fable 5" — Anthropic's flagship model — and said it will be "going open-weight soon." Another Chinese startup, Zhipu (also known as Z.ai), released GLM-5.2 in June 2026.

The rapid release of large-scale open-source models from Chinese firms underscores the accelerating AI competition despite US chip export controls.