Chinese AI startup Moonshot unveiled Kimi K3, a model with 2.8 trillion parameters, claiming it is the world’s largest open AI system and offers performance comparable to Anthropic’s Fable. The launch, coming a month after the US government blocked Anthropic’s Fable and Mythos over safety concerns, highlights China’s rapid progress in closing the gap with American AI leaders.
Moonshot says Kimi K3 is the first open-architecture model to approach the 3 trillion parameter threshold. It is designed for advanced reasoning, long-term coding, and knowledge work. The model offers a context window of 1 million tokens, allowing it to process and remember far more information in a single prompt than previous generations.
Companies like Moonshot, Z.ai, and MiniMax are releasing increasingly advanced models at much lower costs, challenging the long-held Western belief that Chinese developers lag months behind their US counterparts, according to Reuters.
A shift in the AI landscape
Kimi K3 performed competitively compared to Fable 5 (with backup function) and significantly outperformed Opus 4.8, GPT 5.6 Sol, and GPT 5.5 from OpenAI in GPU kernel optimization, Moonshot said.
The release comes amid heightened scrutiny of advanced AI models. The US government had previously blocked Anthropic’s Fable and Mythos, citing national security risks. This move was seen as a blow to the open AI ecosystem in America, but Chinese developers are now filling the gap with their own open models.
Benchmark performance and market reaction
Independent tests show Kimi K3 excelling in several areas. Arena.ai ranked it first in a test assessing web interface creation capabilities, while Vals AI placed it second behind Fable 5 and ahead of GPT-5.6 Sol, Reuters reported.
Artificial Analysis said the model delivered performance comparable to OpenAI’s GPT-5.5 and Anthropic’s Claude Opus 4.8, particularly in tests measuring complex, multi-step tasks.
The news of Moonshot’s release sent shares of domestic rivals Zhipu and Minimax plunging in Hong Kong. By midday, they had fallen 21.9% and 13.8%, respectively.
Źródło: wnp.pl (na podstawie Reuters), Fot. Photo For Everything / Shutterstock
