Moonshot AI released Kimi K3 on Friday, a 2.8 trillion parameter open-weight model that the Chinese startup says rivals Anthropic's Claude and OpenAI's GPT models.

The multimodal model appears to be the largest open-weight model released to date. Moonshot suspended new subscriptions just two days after launch due to overwhelming demand that pushed its infrastructure to capacity limits.

"It is not an uncommon thing to have a supply-demand mismatch when there is a hyped-up new release in the AI industry," said Lian Jye Su, an analyst at Omdia. He noted similar capacity issues occurred when OpenAI released its Sora imaging model.

Geopolitical complications for US adoption

Kimi K3's release highlights a growing challenge for US enterprises seeking alternatives to proprietary models. Despite strong offerings from American companies, China's open-source market has become increasingly competitive.

"For enterprises serious about training their own models, optimizing their own models, it does feel like if you look beyond Nemotron, Nvidia's offering, it's all Chinese now," Su said.

Ongoing US-China tensions, including export controls and chip restrictions, may deter American companies from adopting Chinese models despite their technical capabilities and cost advantages.

Su noted that without geopolitical friction, open models like DeepSeek and Alibaba Qwen would likely see broader US enterprise adoption based purely on performance and economics.

Technical specifications and market impact

Kimi K3 uses a mixture-of-experts architecture, meaning not all parameters activate simultaneously during inference. The model is optimized specifically for agentic coding tasks rather than general-purpose applications.

The release demonstrates that scaling laws remain relevant in AI development, with larger models continuing to deliver superior performance across benchmarks.

Several US companies are responding to Chinese competition in open models. AI startup Thinking Machines recently launched its Inkling open-weight model, while IBM and AI2 focus on open-source alternatives.

Moonshot said it is adding capacity "as fast as it can" to meet demand for Kimi K3 access.