Brennan
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Recent Posts

Jan 2026
RAG Ingestion, Rebuilt (and Simpler Than It Sounds)
Dec 2025
Round 2: 17 models vs. my homepage agent
Picking Your Slope on the AI S-Curve
+15 Field Notes
Nov 2025
Product Hunt Suddenly Feels Like a Firehose
+18 Field Notes
Sep 2025
GEPA: From Evals to Shipping Prompts
Coding in 2025 (part ii)
+5 Field Notes
Aug 2025
Prompting Your Prompt's Prompt
Is Turborepo Is the New Collaboration Surface?
The Disposable Intelligence Era
Jul 2025
Calvin's OpenAI Reflections
How I Document Agent Instructions
Jun 2025
Coding in 2025
You. Are. Not. Using. Enough. Compute.
How I Made My Blog Remember You
May 2025
Testing 4o images from the API
Apr 2025
OpenAI vs. Anthropic vs. Google AI
Seeing UV: Detecting Intelligence Beyond Ours
o3 & o4-mini: OpenAI's latest models
GPT-4.1: A true x.1 Release
If AI-2027 Is Right: What Should We Do?
How I Built a Fully-Automated Agent to Promote My Content on đť•Ź and TikTok
Mar 2025
GPT-4o finally gets it's multi-modal moment
A New “Time Horizon” Metric and Doubling Trends
Blogging in 2025
Does Intelligence Make AI Lean Left?
GPT-4.5 is actually a big deal
Feb 2025
Emergent Misalignment: The Hidden Dangers of Narrow Fine-Tuning
Blueprints for the Next-Gen Code Agents
Notes from Deep Dive into LLMs
o1 to o3 - A Bitter Lesson in Coding
What does Claude's usage tell us?
Linear intelligence, superlinear impact?
User’s Attention is All You Need
Jan 2025
Building The Brain