SITUATION EXPLAINED: What happens to AI labs' margins when the gap between open source and frontier models shrinks to a month? We asked @braeden_norris, investor at @PropelVC "The labs have had this incredible ramp in terms of revenue. But the social tide is changing. People are thinking more about costs." "They're in this constant battle between each other and also between open models, keeping that gap between near frontier and frontier alive. The existence of these margins is probably…