JackBuilds Blog

AI for small business, built in public.

Plain-English notes on building AI chatbots, automations, and apps for real businesses. What I'm shipping, what's working, and how to get good at AI without the hype.

Claude Fable 5 pulled by US government export control directive

AI Models and Tools

The First Government-Forced AI Takedown: What Really Happened to Fable 5

Claude Fable 5 lasted 72 hours as a public product. A jailbreaker, a Friday afternoon government letter, and a new kind of infrastructure risk nobody was planning for.

16 June 20265 min read

Cursor AI spending dashboard showing $346 daily spend across Claude Fable 5 and Opus 4.8

AI Models and Tools

Claude Fable 5 Review: I Spent $1,000 on AI Tokens to Find Out If It's Worth It

Honest review after spending $1,000 on Claude Fable 5 tokens in one week. Security findings Opus 4.8 missed, benchmark comparisons, cost breakdown, and when to actually use it.

11 June 20267 min read

Neuroscience and DNA research transforming into AI and code

Building with AI

I left an Oxford-track PhD to build AI full-time. Here's what happened.

An Oxford MSc and a half-finished PhD in the biology of aging, and now I build AI tools for businesses full-time. Why I switched, what changed, and how to actually get good at AI.

3 June 20265 min read