Building an AI application is easy. Building one that handles streaming responses, manages costs,...
Next.js 15 streaming architecture keeps AI credentials server-side while clients receive token-by-token responses without latency. Rate limiting, graceful error handling, and single SDK instance patterns prevent cost spike and credential leaks in production AI applications.
Building an AI application is easy. Building one that handles streaming responses, manages costs, scales cleanly, and doesn't leak API keys takes more thought. This guide covers the architecture decisions and implementation patterns I have learned from building TokenPulse and several other AI-powered tools with Next.js.
The stack
Next.js 15 (App Router)
TypeScript
Tailwind CSS
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