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January 14, 2026

31 Days of Vibe Coding - Day #14: When AI Starts Hallucinating

I’ve done this myself. I’m writing a new code block, and I need data from one of my API endpoints. So I call the endpoint, and get “not found” errors. I assumed I had already build the endpoint earlier (as I should have.)

Artificial intelligence does this as well, and we call it a hallucination. In many cases, it’s just making assumptions about things it expected to be true.

At one point, I changed my admin user account credentials on my dev server to match what AI was convinced it should be. It was easier than correcting it every. single. time.

Day 14: When AI Starts Hallucinating | 31 Days of Vibe Coding

AI is confidently generating functions that don’t exist and APIs that aren’t real. Here’s how to spot hallucination, understand why it happens, and prevent it from shipping.

What’s been the worst hallucination you’ve seen?

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