China's Kimi K3 Model Pauses New Subscriptions as Demand Overwhelms Capacity
Kimi K3, a Chinese AI model that rattled US rivals, has suspended new subscriptions days after launch because demand outpaced its available capacity.
What happened
The Chinese artificial intelligence model Kimi K3 has suspended new subscriptions after a flood of demand overwhelmed its capacity within days of launch, The Associated Press reported. AP notes the model has already caused a stir in the US tech industry. According to AP, the episode highlights the challenge Chinese AI developers face in serving a fast-growing user base at home and abroad, at a moment when the US-China tech race is intensifying.
AP's report places Kimi K3 in a wider pattern: Chinese open-source, lower-cost advanced AI models, including DeepSeek's latest V4, have been gaining global attention quickly. AP recalls that DeepSeek's early-2025 release shook world markets and helped establish China as a serious competitor to the United States, where Chinese frontier models are largely open source, meaning they are made accessible for people to examine and build upon.
Moonshot's own account
Moonshot AI, the Beijing-based company behind Kimi K3, wrote in a post on X late on Sunday that "Kimi K3 has received far more love than we expected." The company added that "over the past 48 hours, demand has pushed close to the limits of our current capacity," per AP's report.
Moonshot said it is prioritizing existing subscribers while temporarily pausing new ones, adding, in a line AP quotes directly, "we're adding capacity as fast as we can and will reopen new subscription spots in batches." The company posted a similar message on Chinese social media, AP reported.
Why it caused a stir
AP reports that K3's public rollout late last week aimed to challenge more advanced models from Anthropic, OpenAI, and others, and that the launch rattled US rivals. At 2.8 trillion parameters, a measure of an AI model's capabilities, Kimi K3 is described by AP as the world's largest open-source AI model.
What an analyst told AP
Lian Jye Su, a chief analyst at the technology research and advisory group Omdia, told AP that "new model releases generally trigger massive interest, which can strain existing compute infrastructure." Su added, according to AP, that the surge "does show Moonshot AI does not have sufficient compute chips to serve the current surge in demand."
Su told AP the more likely explanation was that Moonshot had not fully anticipated how popular K3 would become, calling the model "very demanding" in terms of compute requirements, which makes allocating compute for it both challenging and expensive. AP also reports that, by a measure of front-end coding capability used to rank AI model performance, Kimi K3 topped the chart among major advanced AI models.
Key facts
- Kimi K3 suspended new subscriptions within days of its public rollout, per AP.
- Moonshot AI said demand pushed close to its capacity limits within 48 hours.
- Kimi K3 has 2.8 trillion parameters and is described as the world's largest open-source AI model.
- Moonshot is prioritizing existing subscribers and plans to reopen new spots in batches as it adds capacity.
- Analyst Lian Jye Su of Omdia said Moonshot likely did not fully anticipate the surge in demand.
Check your understanding
How many hours did Moonshot AI say it took for demand to push close to Kimi K3's capacity limits? What did analyst Lian Jye Su of Omdia say was the more likely reason behind Moonshot's capacity strain?