2026-10-01 # Vercel to retire First Input Delay metric from Speed Insights on Nov 1 Vercel says Speed Insights will stop recording First Input Delay measurements on November 1st, per vercel.com, noting Interaction to Next Paint already serves as the responsiveness metric in its Real Experience Score and that existing FID data remains viewable. Source. [vercel.com](https://vercel.com/changelog/speed-insights-deprecates-first-input-delay-on-november-first) [SOTO home](https://signalsoftomorrow.com/)