Theorem co-founders @rajashree + @diagram_chaser explain why verified AI sandboxes are still months away despite the latest breakthroughs in automated theorem proving: Rajashree Agrawal: "The models just got good enough to prove these theorem statements, or they're still getting there. One of the costs is just tokens." Jason Gross: "Taking the recent Navier-Stokes news as a baseline, the models wrote something like 600,000 lines of Lean in about 17 hours. This works out to between one…