Sam Altman confirmed (paywalled, sorry) in November that GPT-5 was already under development. (Interestingly, the confirmation was almost exactly six months after Altman told a senate hearing (under oath) that “We are not currently training what will be GPT-5; we don’t have plans to do it in the next 6 months.”)
Sam Altman confirmed (paywalled, sorry) in November that GPT-5 was already under development. (Interestingly, the confirmation was almost exactly six months after Altman told a senate hearing (under oath) that “We are not currently training what will be GPT-5; we don’t have plans to do it in the next 6 months.”)
“Under development” and “currently training” I interpret as having significantly different meanings.
It probably began training in January and finished around early April. And they’re now doing evals.