There are private datasets, and 3rd party providers of these models. Fable doesn’t have a datapoint here because of its particular data retention policy. Even if you don’t trust AWS, do you think Opus on AWS is also sending the data to Anthropic? Do you have any evidence?

It's like we've come full circle:

First people practiced L33t3cod3 problems for interviews

Then people built AIs to build software

And now the AIs are studying L33t3cod3 problems

It is RLVR, Not a puzzle, Not leetcode