I just used o3 to design a distributed scheduler that scales to 1M+ sxchedules a day. It was perfect, and did better than two weeks of thought around the best way to build this.
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Your anodectical example isn't more convincing than “This machine cracked Enigma's messages in less time than an army of cryptanalysts over a month, surely we're gonna reach AGI by the end of the decade” would have.