Engineering Insights

Streamdown 2.4: More customization, accessibility and custom rendering

Streamdown v2.4 introduces customization hooks, accessibility features, and user experience improvements for developers rendering markdown. Teams can now customize the appearance of their markdown output using several new properties. You can override the built-in icons by passing a specific component map to the prop.icons The now accepts a option for light and dark Shiki themes, a meta option for custom starting line numbers, and an virtual component for styling inline code independently fr

Run cron jobs from deployment summary

You can now run cron jobs from your application in the summary section of your deployments dashboard. Try it out by deploying a . Once you deploy, Vercel automatically registers your cron jobs. Vercel cron job template Learn more in the .cron jobs documentation Read more

Stripe is now generally available on the Marketplace and v0

You can now connect your production Stripe account to Vercel and start accepting real payments. The integration securely provisions your API keys as environment variables and supports both sandbox and live modes. Test your payment flows in sandbox, then move to production without manually exchanging or managing keys. Built in collaboration with Stripe, the new key management APIs make it possible to reduce setup friction while strengthening security from day one. This unlocks real production us

Create private blob stores with a single click in v0

Teams can now create private and public blob stores with a single click in v0. When adding Vercel Blob to a chat, a dialog lets you select your preferred region and access type. Private storage is selected by default and requires authentication to access sensitive files, while public storage allows direct reads for assets like media. Once connected, the agent automatically understands your store's configuration. It writes the correct implementation for your choice, setting up authenticated deliv

GPT 5.4 is now on AI Gateway

GPT-5.4 and GPT-5.4 Pro are now available on AI Gateway. This model brings the agentic and reasoning leaps from GPT-5.3-Codex to all domains. This includes knowledge work like reports, spreadsheets, presentations, and analysis in addition to coding. It handles complex multi-step workflows more reliably, including tasks that involve tools, research, and pulling from multiple sources. GPT-5.4 is faster and also more token-efficient than previous iterations (GPT-5.2). GPT-5.4 Pro is for developers

GPT-5.4 Thinking System Card

Introducing GPT-5.4

Introducing GPT-5.4, OpenAI’s most most capable and efficient frontier model for professional work, with state-of-the-art coding, computer use, tool search, and 1M-token context.

Reasoning models struggle to control their chains of thought, and that’s good

OpenAI introduces CoT-Control and finds reasoning models struggle to control their chains of thought, reinforcing monitorability as an AI safety safeguard.