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I Built a ChatGPT-Clone in 100 Lines of Next.js (Streaming + Tools + One-Line Provider Swap)

Day 41 of TechFromZero. The Vercel AI SDK is the abstraction that finally makes building a real chat UI a one-evening project. Streaming tokens, system prompt, tool calls — 100 lines, every line explained.

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sabato 6 giugno 2026·dev.to
I Built a ChatGPT-Clone in 100 Lines of Next.js (Streaming + Tools + One-Line Provider Swap)
Day 41 of TechFromZero. The Vercel AI SDK is the abstraction that finally makes building a real chat UI a one-evening project. Streaming tokens, system prompt, tool calls — 100…