Sam Altman views Steve Jobs as one of his inspirations (he called the iPhone the greatest product of all time). So if you look at OpenAI in the lens of Apple, where you think about making the product enjoyable to use at all costs, then it makes perfect sense why you’d spend so much money to go from 4o to 4.5 which brings such subtle differences to power users.

The vast majority of users, which are over 300 million weekly, will mainly use 4o and whatever is the default. In the future they’ll use 4.5 and think it’s most human like and less robotic.