> GPT‑6 Astra brings together years of research and big bets across pre-training

Do we know if they’ve finally completed another pre-training run, or is this building off the same pre-training base they’ve been using since the GPT-4 days?

the last model to use the gpt-4o base model was gpt 5.1, since then its been new pre-trains but this is a new one entirely to itself