Alex McFarland
Inside a one-person, all-Claude operation. Real systems, shown in the open so you can build your own.
| Platform |  | Pricing | Freemium | Publishes | Twice weekly |
|---|---|---|---|---|---|
| Issues | 182 | Founded | 3 years ago | Last Issue | 7 days ago |
| Active | |||||
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alexmcfarland.substack.comLatest Issues
When to use Fable 5 vs. Opus 4.8 vs. Sonnet 5 (my 3-question test)
On July 19 (the date keeps getting pushed), Fable 5 leaves the paid Claude plans. The strongest model Anthropic has ever shipped will likely be pay-per-use: $10 per million tokens in, $50 out. That’s double Opus 4.8, and it makes Fable 5 th...
How to create a second brain with Fable 5
This week I pointed the strongest AI model that’s ever existed at a folder of markdown files, and it caught me arguing with myself in public.
Two of my published pieces, opposite sides of the same rule. A page still claiming I’d “never tri...
Fable 5 is back. You have until July 7 to get the most out of it.
Fable 5 came back this morning.
If you missed it: Anthropic released the most powerful model we’ve ever had access to on June 9. I got three days with it. Long enough to switch my operation over and film my reaction the same day. Then the...
I'm releasing my personal library of Claude skills
A couple days ago I gave away the Co-Operating System, the foundation I run my business on, free to the whole list. 13,000+ of you can now install it into Claude Code and run the same system I do.
This is the next layer.
I just turned on...
Anthropic just released its most powerful model ever (Claude Fable 5)
The model Anthropic said was too dangerous to release is now in your hands.
Claude Fable 5 is live — a public version of Mythos, the model they locked behind closed doors because of how capable it is. It’s a full tier above Opus 4.8. State...
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Authors
The writers behind this newsletter.
I run a full business solo on Claude: newsletters, SaaS, ghostwriting for CEOs, and client agent systems.
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