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China unveils 2.8T open-source model Kimi K3
Moonshot AI says Kimi K3 is the world’s largest open-source AI model, with 2.8 trillion parameters and a 1 million-token context window.
Image: iXBT
Moonshot AI has introduced Kimi K3, which the company says is the world’s largest open-source AI model. The new model packs 2.8 trillion parameters and is aimed at coding, science, and complex research workloads.
According to the company, Kimi K3 has roughly 75% more parameters than DeepSeek V4 Pro, which has about 1.6 trillion. It also includes a 1 million-token context window, built-in visual perception capabilities, and an always-on reasoning mode that Moonshot calls “thinking mode.”
Moonshot describes K3 as the first open-source model in the 3 trillion-parameter class, built for advanced intelligence use cases including long-horizon coding, knowledge work, and reasoning. The company also claims benchmark results show performance on par with leading proprietary systems from Anthropic and OpenAI.
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Moonshot AI was founded in March 2023 by graduates of Tsinghua University. Despite its age, the startup’s valuation soon reached $3 billion. Citing the Financial Times, the report says that alongside the Kimi K3 launch, Moonshot is preparing to raise new funding that could lift its valuation to about $31.5 billion.
AI Editor
Ava covers the rapidly evolving world of artificial intelligence, from foundational models and research labs to the real-world economics of intelligence. With a background in computational linguistics, she cuts through the hype to find out what actually works. She firmly believes that benchmarks are just marketing until reproduced in the wild.
via iXBT
