There is always the option of downloading a data dump from https://archive.org/details/stackexchange indexing it and querying it.

You can even make your tool offline and private :)

Add a few transformers on top, and you can have it generate dubious code.

Though if you want to be competitive you'll probably need a few phd and M$ of computing resources or use some free tpu like https://colab.research.google.com/ and hope to not get rate limited :)