This is of course unsubstantiated, and probably impossible to do so from the outside.

OpenAI said

> Following an investigation, we have confirmed that Buckmaster’s Codex prompts over the two months preceding this announcement and paper on September 8, 2026, could not have influenced the system in any way, including through training.

OpenAI initially said it was uncertain whether or not it could have happened. Following investigation they said the above. And that no user input beyond whatever date could have affected the system.

So the question is do you believe this or not? Short of an external audit the answer will be “no” for many people who will continue to repeat as fact that OpenAI stole and laundered the solution. Even if an external audit found nothing, there’d still be people who didn’t believe it and kept repeating the same lines they read from other commenters. Even the original researcher isn’t making claims as strong as the average HN user is doing on his behalf.

The only thing that’s really substantiated is that OpenAI’s research on Navier-Stokes was done because of knowledge of competing work.