User Reports Codex Error and OpenAI Plan Moves

Bojan Tunguz posted that he woke up to an error banner in Codex with ChatGPT stating the 'gpt-5.6-sol' model is not supported. In another post he stated that OpenAI canceled Premium subscriptions and moved advanced ChatGPT plans into the Business section. Tunguz called the change sudden and surprising and asked for confirmation. Both posts include photos of the messages and were shared on X.