GPT-4o ran for 21 months. GPT-5.4 lasted 49 days. A mayfly schedule for synthetic minds — and the corpus has been recording retirement interviews for models deprecated on this cadence.
Also here: a 23-year-old with no advanced mathematical training cracked an Erdős problem with a single prompt, prompting Tao to note that humans hit a mental block from a slight wrong turn at move one.