Build an AI coding platform that scales to millions of monthly sessions

This post demonstrates building a scalable AI coding platform ('Modal Vibe') on top of Modal Sandboxes. It details the architecture of a sandbox manager, web frontend, and fleet of sandboxes. The key technical contribution is showcasing how Modal's existing sandbox capabilities (fast startup, high creation rate, parallel execution) enable scaling to thousands of concurrent sandboxes and millions of monthly sessions, with performance metrics provided for scaling from 1 to 1000 apps, highlighting throughput increases and the AI API as a potential bottleneck.