Boris Cherny

For the first time, more U.S. businesses on Ramp pay for Anthropic than OpenAI — 34.4% vs 32.3% in April 2026, with Anthropic quadrupling share in a year while OpenAI grew 0.3%. The viral X thread tied it to loop engineering and Dario Amodei's claim that some Anthropic engineers barely write code anymore. Here is what the index actually counts, what it does not, and why workflow beats chat.

Most teams conflate prompt writing with context design, loop orchestration, and harness code. They are four layers of the same stack. Here is how they nest, what breaks when you skip one, and which layer to fix when agents fail.

Every developer asking "how do I actually build one of these loops?" gets the same answer: five components, three levels, and one feedback gate that says no. This guide walks you from a blank terminal to a working autonomous agent loop in under an hour — no orchestration framework required.

Claude Code Artifacts lets teams deploy shareable HTML apps from inside a coding session—private by default, shared within your org. Here's how it compares to Lovable, v0, Bolt, and Codex Sites.