Fair enough. In that case small models like devstral [1] are probably your best bet

[1] https://mistral.ai/news/devstral

All the model providers have offerings that promise not to train on your code. Can you trust them not to do it anyway? Maybe not. What's the actual damage if they did? You have to balance the expected productivity loss from forgoing the use of these tools with the risk that comes from sharing your code with them. You may want to reevaluate that somewhat frequently. I think there is a tendency in some circles to be a little bit to precious with their code.