Building a ChatGPT-Like App in React — Streaming, OpenAI, RAG, and pgvector (Real Code + Metrics)
This story is from 2026-08-26. It is preserved in the archive; the latest stories are on the live feed.
Building a ChatGPT-style assistant looks easy in a demo and breaks in three places when it goes to production: the responses don't stream (users stare at a spinner), the model hallucinates (it has no idea what's in your docs), and your costs explode . The difference between a demo and a shippable a…
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- 2026-08-26 18:40 · DEV Community — AI
Building a ChatGPT-Like App in React — Streaming, OpenAI, RAG, and pgvector (Real Code + Metrics)