Best of Vercel — January 2026

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   Video

   Theo - t3․gg·18w

   I moved off of Next.js

   A detailed account of migrating T3 Chat from Next.js to TanStack Start, driven by technical requirements rather than framework dissatisfaction. The original Next.js setup involved hacking React Router into Next.js for a client-first experience, which worked but wasn't sustainable. After exploring multiple alternatives (Remix, Vite+Hono, Cloudflare Workers), the team chose TanStack Start for better client-side routing, frontend-backend synchronization, and team ownership. The migration required 14,000 lines added and 10,000 removed, plus patching TanStack Start itself and moving API routes to Nitro to handle scaling issues. The move wasn't about Next.js being bad, but about finding a framework that better matched their specific needs for a fast, client-focused chat application while keeping frontend and backend deployments synchronized.

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2. 2
   Article

   Vercel·17w

   AI Voice Elements

   Vercel released AI Voice Elements, a new component library for the AI SDK that enables building voice agents and transcription services. The release includes six components: Persona (animated AI visual with Rive WebGL2), SpeechInput (voice capture with Web Speech API fallback), Transcription (synchronized playback display), AudioPlayer (customizable playback built on media-chrome), MicSelector (microphone device selection), and VoiceSelector (AI voice selection interface). All components are built on shadcn/ui and can be installed via npx.

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3. 3
   Article

   Vercel·16w

   Summary of CVE-2026-23864

   Multiple high-severity denial of service vulnerabilities (CVE-2026-23864, CVSS 7.5) were discovered in React Server Components affecting versions 19.0.x through 19.2.x. The vulnerabilities can be triggered through specially crafted HTTP requests to Server Function endpoints, potentially causing server crashes, out-of-memory exceptions, or excessive CPU usage. Affected frameworks include Next.js versions 13.x through 16.x, along with other tools using React Server Components. Vercel deployed WAF mitigations automatically, but immediate upgrades to patched versions are required. Fixes are available in React 19.0.4+, 19.1.5+, 19.2.4+ and corresponding Next.js versions.

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4. 4
   Article

   Vercel·19w

   AI Gateway support for Claude Code

   Vercel AI Gateway now supports Claude Code through an Anthropic-compatible API endpoint. Configure Claude Code to route requests through AI Gateway by setting environment variables (ANTHROPIC_BASE_URL, ANTHROPIC_AUTH_TOKEN, and an empty ANTHROPIC_API_KEY). This enables centralized usage tracking, observability traces, and failover capabilities between providers.

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