The spotlight of the Next.js 15.4 release is on Turbopack, which is now production-tested. Vercel.com is already powered by next build --turbopack, and the bundler has passed all 8,298 integration tests. The Next.js team is now focused on chunking optimizations and addressing bugs reported by early adopters.
The update post announced that Turbopack will enter public beta in Next.js 16, expected later this summer. The preview of version 16 includes:
- Cache Components (beta): Consolidates Dynamic IO,
use cache, and Partial Prerendering under onecacheCompontentsflag. - Optimized Client Routing: Smarter prefetching, cleaner cache invalidation, and lower bandwidth usage for App Router navigation.
- DevTools Enhancements: Inspect route structures, toggle components like
loading.tsx, and experiment with browser log forwarding to enable AI-assisted debugging. - Middleware Runtime (stable): Node.js support for Middleware is now stable and out of experimental mode.
- Deployment Adapters (alpha): Build custom adapters to better control deploy targets and environments.
Next.js 16 will also deprecate support for Node.js 18, AMP, and certain legacy next/imageAPIs. Migration paths will be provided.
To learn more, read the full release post.
Check our Next.js App Router vs Page Router Comparison.
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