i know someone who works on nuclear power plants that uses codex

obviously you need to review it

That's terrifying.

It is. Not per sé because the code might be of poor quality, but because someone sent that source code to a public API under the promise that oh noooo we won't use your code for training. Probably.

enterprise agreements with model providers let you opt out of training

If they ever used Fable, it's sitting in Anthropic's servers for a month