"Your vibe-coded SaaS is 2019 software, written faster" — ChatGPT co-author thread
ccerrato147 · x · 2026-09-20
Thread opener by ccerrato147: a co-author of ChatGPT, GPT-4 and InstructGPT said on stage at AI Engineer that the SaaS you vibe-coded last week is 2019 software, written faster — just-in-time software is the sweating brain, smart software is the brain in the box. The thread argues RLHF optimizes for human approval rather than correctness, making AI elite at pleasing humans but useless for decisions with stakes, and introduces TypeSafe's Jev, which uses typed calibrated decisions instead of text generation.
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