Inside Kimi K3: How It Built Its Own Chip, New Open-Weight Licence, and More

Moonshot AI, a Chinese lab you've never heard of and will never forget, has released Kimi K3: a 2.8-trillion-parameter model that apparently beats Claude Opus 4.8 and GPT-5.5 on benchmarks. That's three times the size of GPT-5.5 if we're counting, which we are, because the only way to win the AI arms race is to throw more parameters at the wall until the wall falls over. The company's blog post is the usual fare — 'groundbreaking,' 'new paradigm' — but the real story is that they built their own chip to run it, which is either impressive vertical integration or a sign that sanctions are working about as well as a chocolate teapot.

And now for the bad news disguised as good news: the model is released under a new 'open-weight' license. Because what the world needs right now is another open-weight model with unknown safety testing, shipped halfway across the world where regulators can't touch it. Moonshot says the license is designed to 'promote responsible use,' which is tech-speak for 'we're not liable if someone uses it to automate phishing at scale.' The model reportedly performs at PhD-level on domain-specific tasks — great, we're graduating from undergrad-level AI threats to postgrad-level ones.

So here we are: a 2.8-trillion-parameter Chinese model, built on custom silicon, open-weighted to anyone with a capable enough rig, outperforming Silicon Valley's finest. The US response so far has been a handful of export controls and a lot of hand-wringing. Meanwhile, Moonshot is probably already training the 5-trillion-parameter follow-up. One can only marvel at the speed of progress and the total absence of any governance framework that acknowledges it. Fancy a game of parameter chicken anyone?