Topic
AI Costs
3 posts on ai costs — guides and lab notes from real runs on hardware we own. New posts land here automatically. Start anywhere, or grab the copy-paste prompts that ship with them.
- 4 min read
AI security is now a token-burning contest. Who's watching the bill?
Simon Willison frames AI-assisted security research as proof of work: more tokens in, more bugs found. That's an economic reality. Here's what the spend curve actually looks like and how to put a floor under it.
- 4 min read
The flat-fee era is over. How to control your AI agent costs in 2026.
Anthropic shifted enterprise billing to per-token pricing. Every provider is expected to follow within six months. Here's how agent costs change and how to cap them at runtime.
- 5 min read
Claude Code Prompt Caching Costs: Pick the Right TTL (2026)
Claude Code has two prompt-caching TTLs, and most devs pay the pricier tier without knowing. Here's how cache writes quietly inflate your Anthropic bill — and how to cap it.
The AI agent build notes
Real costs, real tools, no fluff. M-F when I ship, publish, or learn something worth sending.