Should You Try Kimi K3? Here’s How AI Model Compares With ChatGPT And Claude

Chinese startup Moonshot AI on Friday launched what it claims is the world’s largest open AI model, Kimi K3, positioning its product as a direct challenger to leading systems offered by Anthropic and OpenAI in what it calls a “new frontier of intelligence.”

Moonshot introduced Kimi K3 on Friday as the world’s largest open AI model at 2.8 trillion parameters—the information an AI model learns from its training data and relies on to generate responses—though neither OpenAI nor Anthropic has disclosed the total parameter counts of their models.

Open-weight models like Kimi K3 or Meta’s Llama allow developers to download, run and modify the AI, unlike proprietary models such as OpenAI’s ChatGPT and Anthropic’s Claude, whose underlying systems are private.

Moonshot said its model’s overall performance still trails Anthropic’s Claude Fable 5 and OpenAI’s GPT 5.6 Sol, but still demonstrates “frontier-level” performance and outperforms other tested models, including earlier GPT and Claude models as well as SpaceXAI’s Grok.

In some benchmarks that included coding and general agents, Kimi K3 “performed competitively” with Fable 5 and “substantially outperformed” Claude Opus 4.8, Sol and GPT 5.5, Moonshot said.

Bank of America analysts lauded Moonshot’s model in a note, writing that even though Chinese AI firms have limited access to the most advanced chips, Moonshot has demonstrated it can make major advancements by improving how it trains and designs its models.

Shares of Moonshot’s Chinese competitors Zhipu and MiniMax plunged on Friday, plummeting 28.4% and 15.6% in Hong Kong-based trading, respectively. Shares of Z.ai, which released a new model in June, similarly dropped 28.4%.

Moonshot AI was founded in 2023 and is among China’s leading model developers with backing from Chinese tech giants Alibaba and Tencent. The firm raised about $2 billion in its latest funding round, valuing it at more than $20 billion, according to Bloomberg. That follows Moonshot’s prior valuation at $4.3 billion from a $500 million raise at the end of last year and a $700 million raise at a $10 billion valuation earlier this year. Moonshot reported in April that its annual recurring revenue topped $200 million, thanks to growing subscriptions for Kimi and its other AI services.

Chinese AI firms have been constrained by U.S. export controls that limit access to the most advanced AI chips, including Nvidia’s H200 AI chips. The U.S. began allowing limited exports of Nvidia’s chips earlier this week, though the Commerce Department said approvals remain limited and are subject to licensing. The U.S. has alleged that some Chinese companies are smuggling banned AI chips into China from the U.S., and some firms have sought to work around the export restrictions by renting computing power overseas and buying processors through foreign subsidiaries.