Beijing-based AI startup Moonshot unveiled Kimi K3 on July 17, a 2.8 trillion-parameter open-weight model designed for advanced reasoning, long-horizon coding, and knowledge work.

Moonshot said Kimi K3 supports a 1 million-token context window and performed competitively with Anthropic’s Fable 5.

It also outperformed OpenAI’s Opus 4.8 and GPT 5.6 Sol in graphics processing unit kernel optimisation.

The company also cited rankings from Arena.ai and Vals AI.

Arena.ai ranked Kimi K3 first in a benchmark for building web interfaces, though public material reviewed did not detail the methodology.

Moonshot is backed by Alibaba and Tencent.

Last month, Moonshot was reported to be seeking US$2 billion in fresh funding at a valuation of about US$30 billion ahead of a potential Hong Kong listing.

The launch comes as Chinese AI firms such as Z.ai and MiniMax release increasingly powerful models at lower cost, narrowing the gap with US rivals.

🔗 Source: Reuters

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