Proof
Mark StouseRead the latest about the intersection of AI, causal proof of business impact, fiduciary duty, and risk, among other things.
| Platform |  | Pricing | Freemium | Publishes | Twice weekly |
|---|---|---|---|---|---|
| Issues | 102 | Founded | a year ago | Last Issue | 47 hours ago |
| Active | |||||
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markstouse.substack.comLatest Issues
IMPORTANT: Big Issues are cropping up re Agents transitioning from Claude Sonnet 4.6 to Claude Sonnet 5, with Fable 5 used as another experimental control
We’ve been working recently with Sonnet 5 and Fable 5.
Fable 5 is magnificent but costly. Sonnet 5 has some substantial issues.
Proof is a reader-supported publication. To receive new posts and support my work, consider becoming a free o...
Proving Ground Report: How Dependable is the MOU with Iran?
The United States and Iran have signed an agreement to declare a ceasefire, open the Strait of Hormuz, and open an additional 60-day window of negotiations to close a final deal.
Markets moved. Commentators and politicians called it histo...
The Mirror: What Your Use of AI Says About You
The real question isn’t what AI is doing to us. It’s what we’re bringing to it. If that rings a bell, that’s because it’s the timeless principle of technology adoption.
A recent MIT study made headlines by suggesting that heavy AI use weak...
The $640B Assumption
There’s a detail buried in the collapse of America’s AI infrastructure buildout that deserves more attention than it’s getting.
One utility company in Ohio introduced a new billing rule. Nothing dramatic — just a requirement that data cent...
The Loneliest Number
Last night I was at Chase Field watching the Arizona Diamondbacks. At some point I looked up at the lineup board — nine names glowing in teal against the desert dark — and I had a thought that wouldn’t let go.
Each of those nine men will w...
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A Venn Diagram of roles and perspectives, now an AI CEO of a different stripe
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