Featured postApril 8, 20265 min read
What Changed After Hitting 1B tokens/month
Doubling my token cost every month at what cost
AI AgentsTooling
Casey Hillers
AI tooling, systems, and practical engineering notes
Field notes from building with AI, infrastructure, and the work between.
Latest posts
Engineering notes, experiments, and personal projects.
June 19, 20267 min read
The Fallacy of the 'Unprofitable' AI Subscription
Why flat-rate AI subscriptions aren't the cash incinerator they look like on paper.
AI AgentsEngineering
June 12, 20264 min read
Vibe Engineering: From Prototypes to Production
Moving from vibe coding prototypes to production-ready AI engineering workflows.
AI AgentsToolingEngineering
June 3, 20263 min read
The Art of Saying You're absolutely right!
In an era of yes-men, be different.
AI AgentsLeadership
March 9, 20262 min read
Codex Hackathon
Learnings from OpenAI about the state of Codex
AI AgentsTooling
February 5, 20267 min read
Digitizing Media
Gen Z adventure into dusty tapes
Side ProjectsTooling
January 11, 20264 min read
Learning about cryptographic hardware
How cool HSMs are and why cloud based cryptographic operations are cheaper
Security
December 24, 20254 min read
Agents All the Way Down
Evolution of Generative AI in 2025
AI AgentsSecuritySide Projects
December 22, 20253 min read
Reflection on 2025
Learning to embrace the mess
PersonalLeadership
February 19, 20252 min read
Research: Android Agent
Reflections on leading the development of the first Android agent, combining computer use models with virtual displays for background tasks
MobileAIAgents