Debate over whether the August 28 RL run used a post-Astra base model

Spencer Schiff @spencerschiff_Originally posted 2026.09.15

Open original on X

@willdepue They explicitly said it was an RL run, and also it *resumed* on August 28th, not started on August 28th. It could have been an RL run on top of a new base model though, and it has been rumored that OpenAI has a post-Astra base but not sure if those rumors are credible