Matt Horn

My receipt printer prints an original artwork every morning

Sat, 04 Jul 2026 00:00:00 +0000

Written in a personal capacity. Views are my own, not those of any employer.

The first minutes of my day were going to my phone. I’d wake up, scroll the news, check the weather, and feel slightly worse for it. So I made a bet with myself: could the same inputs (weather, headlines, whatever today’s date means) arrive on paper instead, once a day, with nothing to refresh?

Here’s what came out of the printer yesterday and this morning:

Security Is Becoming an Epidemiology Problem

Sat, 11 Apr 2026 00:00:00 +0000

Written in a personal capacity. Views are my own, not those of any employer.

I’ve been thinking a lot about Claude Mythos and Project Glasswing this week. Anthropic announced a new AI model that is too dangerous to release publicly: it can autonomously discover and exploit high-severity, multi-step vulnerability chains in nearly every major operating system, browser, and other critical software, some of which had gone undetected for over 27 years. Over 50 organizations¹ are now working to remediate what it found, and it’s a massive headache for security engineers across the industry. Jerome Powell and Treasury Secretary Scott Bessent met with the CEOs of most major banks this week to discuss the risks.

The Seahorse Emoji

Fri, 27 Mar 2026 00:00:00 +0000

Written in a personal capacity. Views are my own, not those of any employer.

The year is 2028, and Claude Opus 10.0 has just been released. Sarah, twelve years old and somewhere in Nebraska, can’t wait to try it. She types the prompt she always tries first on a new model: “Show me the seahorse emoji.” Send.

The model starts thinking…

Generating seahorse emoji

Investigating non-existent seahorse emoji…

Searching Unicode Consortium proposal archive…

Resume

Mon, 01 Jan 0001 00:00:00 +0000

Written in a personal capacity. Also available as a PDF.

Software Engineer | Google | July 2025 - Present

Google Cloud AI: improving reliability, scaling, security, and error handling for the infrastructure serving Gemini and other models.
Previous project: supporting Google Cloud Dedicated, Google’s sovereign cloud offering for European customers, including reliability-monitoring infrastructure adopted by peer teams.
Java readability mentor.

Member of Technical Staff | OpenAI | August 2024 - April 2025