SITUATION EXPLAINED: Sam Altman is briefing Congress on GPT-6 next week. • Altman will brief the Trump administration and lawmakers on OpenAI's next model family • This comes as US officials develop a formal AI safety review framework, expected to be completed within weeks • Chris Lehane, OpenAI's Chief Global Affairs Officer, said part of Altman's meetings will focus on "how they will affect work," adding only that "there's going to be some really interesting capabilities with this model…