Matt Wolfe compares ChatGPT-5.4 and 5.5 by asking both for a health plan with no detail. The 5.5 version pulls from his chat history, identifies his specific habits like skipping meals and low protein intake, and adds a travel plan. The upgrade is that it understands context without needing you to spell everything out.
According to this analysis here, GPT-5.5 is objectively the smartest model. You can give it a vague prompt, you don't need to prompt engineer anything, and it will kind of infer what you're looking to do even when you kind of don't know what that end result should be. What you're seeing on the screen here is actually still ChatGPT-5.4. Help me build a plan to be healthier. Super vague. Here's what it gave me. It feels fairly generic, like this could be a health plan that it would just give to anybody. Now, I switched the model to ChatGPT 5.5. When I asked this one, help me with a plan to be healthier, it seemed to have dug into the context of past chats, understood more about me, and gave an answer that was much more fine-tuned to me. Your biggest nutrition issue historically is not that you eat too much junk, it's that you often skip meals, under-eat protein during the day, then eat most of your calories at dinner. That's 100% me. I have had conversations with ChatGPT about that in the past. It even went on to give me a travel plan because it that I travel a lot, where I feel like most people will notice the difference is that doing more with less information.
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