Chinese AI Startup Moonshot AI Launches Kimi K3 Model, Saying It Rivals OpenAI and Anthropic

TradingKey - On Thursday, July 16, Eastern Time, Chinese artificial intelligence startup Moonshot AI officially released its next-generation large language model, Kimi K3. With a total parameter scale of 2.8 trillion, it is currently the world's largest open-source AI model by parameters.

Moonshot AI stated that Kimi K3 is built based on its proprietary KDA hybrid linear attention mechanism and attention residual technology, natively supports visual understanding, and features a 1 million-token context window. It is primarily geared toward scenarios such as long-range programming, knowledge work, and reasoning. The complete model weights will be released by July 27.

According to the evaluation results, K3's overall performance still lags behind Anthropic's Claude Fable 5 and OpenAI's GPT-5.6 Sol, but it has consistently outperformed GPT-5.5 and Claude Opus 4.8 in several areas, including programming, visual understanding, and long-range task processing.

Less than a day after its release, K3 topped the front-end programming leaderboard on the global AI evaluation platform Arena AI with a score of 1,679, surpassing Claude Fable 5's 1,631 points and GPT-5.6 Sol's 1,618 points.

BofA Securities noted that Moonshot AI's new model shows that leadership in the AI industry is becoming fleeting. The parameter size of Kimi K3 is nearly triple that of its predecessor. BofA analysts believe that while Alibaba's (BABA) cloud services benefit from growing AI demand, the "open-source leader" narrative of Tongyi Qianwen faces challenges. Meanwhile, the new model also puts pressure on independent laboratories such as Zhipu (02513.HK) and MiniMax (00100.HK).

Affected by the release of the new model and the global wave of tech stock deleveraging, Hong Kong-listed Zhipu plunged 28.49% to HKD 1,107 on July 17, while MiniMax fell 15.62% to HKD 216.

[Source: Futu]

The timing of Kimi K3's release comes at a juncture when the US-China AI race is intensifying. The 2026 World Artificial Intelligence Conference opened in Shanghai on July 17, featuring more than 1,100 exhibiting companies and showcasing over 3,000 exhibits. As the performance gap with US rivals continues to narrow, combined with cost advantages, Chinese AI models are gradually gaining international market attention. Meanwhile, US lawmakers are considering restricting domestic companies from adopting Chinese AI models.