Next.js 16.3 support on Vercel

What this post added

This post details Vercel's platform-level improvements to support Next.js 16.3's features: immutable static assets, faster routing at scale, and enhanced observability for prefetching and ISR/PPR. It explains how Vercel's CDN and build output API were updated to handle immutable static assets, reducing CDN requests and bytes transferred. It also describes optimizations to the route metadata serving layer for faster routing on large sites and introduces new observability features for prefetch requests, ISR revalidations, and Partial Prerendering (PPR).