The silent removal of Study Mode from ChatGPT is a big mistake (both Claude and Gemini still have theirs) We have enough evidence that using AI in assistant mode to study can hurt learning because it just gives you answers, making students think they learned when they have not. You can prompt the model to be a very good tutor, but most people don't know to do that. Study mode was an easy option that parents and teachers could suggest to mitigate negative effects, even if it wasn't…