It’s happening. The question is, what is the it that is happening? An impressive progression of intelligence? An expensive, slow disappointment? Something else? The evals we have available don’t help us that much here, even more than usual. My tentative conclusion is it’s Secret Third Thing. It’s a different form factor, with unique advantages, that is hard to describe precisely in words. It appears so far that GPT-4.5 has advantages in places like verbal intelligence, contextual adaptation, detailed knowledge, and a kind of abstract writing skill. It has better taste and aesthetics. It is the first model I asked to help edit its own review, and it was (slightly) helpful. It’s a different way to use a lot of compute to get more intelligence. When you need a reasoning model, or you need code written, do not call on GPT-4.5. You need to carve out a new ‘place in your rotation’ for it. GPT-4.5 is ready! Good news: It is the first model that feels like talking to a thoughtful person to me. I have had several moments where I’ve sat back in my chair and been astonished at getting actually good advice from an AI. Bad news: It is a giant, expensive model. We really wanted to launch it to Plus and Pro subscribers at the same time, but we’ve been growing rapidly and are out of GPUs. We will add tens of thousands of GPUs next week and roll it out to the Plus tier then. (Hundreds of thousands are coming soon, and I’m pretty sure you all will use every one we can accumulate.)

Full Review: OpenAI’s ChatGPT 4.5 has improved verbal intelligence, contextual adaptation, abstract writing, and better taste and aesthetics, but not ideal for reasoning or coding.