Engineering Insights

Workers - Preview URLs now default to opt-in

To prevent the accidental exposure of applications, we've updated how Worker preview URLs (<PREVIEW>-<WORKER_NAME>.<SUBDOMAIN>.workers.dev) are handled. We made this change to ensure preview URLs are only active when intentionally configured, improving the default security posture of your Workers. One-Time Update for Workers with workers.dev Disabled We performed a one-time update to disable preview URLs for existing Workers where the workers.dev subdomain was also disabled. Because preview URLs

Detecting and reducing scheming in AI models

Apollo Research and OpenAI developed evaluations for hidden misalignment (“scheming”) and found behaviors consistent with scheming in controlled tests across frontier models. The team shared concrete examples and stress tests of an early method to reduce scheming.

Public AI on Hugging Face Inference Providers 🔥

Introducing Stargate UK

Builds now start up to 30% faster

The build cache stores files from previous builds to speed up future ones. We've improved its performance by downloading parts of the cache in parallel using a worker pool. This decreased the build initialization time by , reducing build times by up to 7 seconds for all plans.30% on average This is enabled automatically for all new builds and adds to the previously launched.build initialization improvements Learn more about .builds on Vercel Read more

Shai-Halud Supply Chain Campaign — Expanded Impact & Vercel Response

Summary Impact to Vercel Customers What We Did What We’re Watching & Doing Recommendations for Vercel Users Timeline References The supply chain campaign has escalated. What began with the Qix compromise affecting ~18 core npm packages (, , , etc.) has since spread:Shai-Haludchalkdebugansi-styles Read more Over 40 additional packages attacked via the Tinycolor “worm” vector. The CrowdStrike / namespace was also compromised, with multiple trojanized releases.crowdstrike-publisher The

AI agents at scale: Rox’s Vercel-powered revenue operating system

is building the next-generation revenue operating system. By deploying intelligent AI agents that can research, prospect, and engage on behalf of sellers, Rox helps enterprises manage and grow revenue faster.Rox From day one, Rox has built their applications on Vercel. With Vercel's infrastructure powering their web applications, Rox ships faster, scales globally, and delivers consistently fast experiences to every customer. Read more

Teen safety, freedom, and privacy

Explore OpenAI’s approach to balancing teen safety, freedom, and privacy in AI use.