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And still the same underlying pre-trained model since May last year..
.. OpenAI has hasn’t a successful training run since then:
"OpenAI’s leading researchers have not completed a successful full-scale pre-training run that was broadly deployed for a new frontier model since GPT-4o in May 2024, highlighting the significant technical hurdle that Google’s TPU fleet has managed to overcome."
So they’re seemingly doing well despite these challenges, if the benchmarks and evals are to be believed!