They use Kimi and post-train it on the same stuff that anyone with a Github dump can feed it. They aren't doing anything that you can't do yourself.

Dumping github into a model is not post training, thats pre training. And every base model already has all of github.

Composer post training is clearly very good, only second to Anthropic and OpenAI.

It does irk me a bit that they try to hide the fact that it's based on a chinese pretrained model though.