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we shipped gpt-5.5 instant today to chat; it's rolling out over the next couple days to everyone. for this model, we focused on factuality, crushing hacks, and improving the baseline intelligence. 5.5 is a pretty big step forward on all three. it is much smarter, significantly less likely to hallucinate, and just more delightful to talk to. there is always more to do but i'm pretty excited about this one!