Nay-sayers will tell you all OpenAI, Google and Anthropic 'monkeypatched' their models (somehow!) after reading this thread and that's why they answer it correctly now.

You can even see those in this very thread. Some commenters even believe that they add internal prompts for this specific question (as if people are not attempting to fish ChatGPT's internal prompts 24/7. As if there aren't open weight models that answer this correctly.)

You can't never win.