Just want to clarify, this is not my Substack, I’m just sharing this because I found it insightful.
The author describes himself as a “fractional CTO”(no clue what that means, don’t ask me) and advisor. His clients asked him how they could leverage AI. He decided to experience it for himself. From the author(emphasis mine):
I forced myself to use Claude Code exclusively to build a product. Three months. Not a single line of code written by me. I wanted to experience what my clients were considering—100% AI adoption. I needed to know firsthand why that 95% failure rate exists.
I got the product launched. It worked. I was proud of what I’d created. Then came the moment that validated every concern in that MIT study: I needed to make a small change and realized I wasn’t confident I could do it. My own product, built under my direction, and I’d lost confidence in my ability to modify it.
Now when clients ask me about AI adoption, I can tell them exactly what 100% looks like: it looks like failure. Not immediate failure—that’s the trap. Initial metrics look great. You ship faster. You feel productive. Then three months later, you realize nobody actually understands what you’ve built.
It’s certainly a use case that LLM has a decent shot at.
Of course, having said that I gave it a spin with Gemini 3 and it just hallucinated a bunch of crap that doesn’t exist instead of properly identifying capable libraries or frontending media tools…
But in principle and upon occasion it can take care of little convenience utilities/functions like that. I continue to have no idea though why some people seem to claim to be able to ‘vibe code’ up anything of significance, even as I thought I was giving it an easy hit it completely screwed it up…
Having used both Gemini and Claude… I use Gemini when I need to quickly find something I don’t want to waste time searching for, or I need a recipe found and then modified to fit what I have on hand.
Everytime I used Gemini for coding has ended in failure. It constantly forgets things, forgets what version of a package you’re using so it tells you to do something that is deprecated, it was hell. I had to hold its hand the entire time and talk to it like it’s a stupid child.
Claude just works. I use Claude for so many things both chat and API. I didn’t care for AI until I tried Claude. There’s a whole whack of novels by a Russian author I like but they stopped translating the series. Claude vibe coded an app to read the Russian ebooks, translate them by chapter in a way that prevented context bleed. I can read any book in any language for about $2.50 in API tokens.
I’ve been using Claude to mediocre results, so this time I used Gemini 3 because everyone in my company is screaming “this time it works, trust us bro”. Claude has not been working so great for me for my day job either.