AI features that earn their place
Shipping AI features that earn their place, and using AI to build faster without shipping worse. Working notes from fivetwentyone.
3 posts
AI Token Costs Compared Across Every Major Provider (2026)
The same AI assistant can cost about $1,100 or over $25,000 a month depending only on which model answers. Here are the 2026 token prices across every major provider, and the costs that never show on the pricing page.
The Real Cost of Bad Website Development
Bad website development doesn't bill you once. It charges rent, in lost conversions, early rebuilds, maintenance you weren't quoted, security exposure, and search traffic that never arrives. Here's where it costs you, with the 2026 data, and what a build that stops billing you looks like.
How to Secure a Vibe-Coded Website: A Founder's Guide for 2026
Vibe-coded sites do not leak because AI writes bad code. They leak because the security layer never gets written. Here is how a founder can audit and harden an AI-built website, from exposed keys to Row-Level Security.