Posts on X circulate a claim from @synthwavedd that OpenAI is preparing to launch Astra imminently, targeting next week. The account describes Astra as a new pretrain and the largest model OpenAI has trained since GPT-4.5, with its most recent internal checkpoint known as mewfour serving as the release candidate. Other accounts quote or retweet the post, with some noting prior links between the model family and ten mathematical breakthroughs shown in an OpenAI research post, and one user calling it possibly GPT-6. No first-party confirmation from OpenAI appears in the packet.