He built Claude Code in three days in his wife’s dark office, surrounded by her basket research. Anthropic is now worth $160 billion.
Boris taught himself to code at thirteen. Needed a website to sell Pokémon cards. Wrote it himself. His grandfather used punch cards.
Last November, Boris wrote his last line of code by hand.
He still codes every day.
He asked Claude what song was playing in his music app. Claude wrote a small AppleScript, ran it, came back with the right answer. Boris didn’t program it to do that. It figured out the tool on its own.
That was the day the chatbot became an agent.
Claude Code launched to two Slack reactions. Flatlined for three months. Dario asked why Boris was forcing employees to use it.
“We’re not forcing anyone,” Boris said. “Everyone just decided to.”
May hit. Usage went exponential.
Now Claude writes 100% of Claude Code. Over 90% of all code at Anthropic. Boris hasn’t touched a line since November.
A journalist asked what he calls himself now.
“Whether I write the code or an agent writes it, that’s not the question. What are you building and why.”
His grandfather computed with punch cards. Boris wrote TypeScript textbooks.
The tool he built in three days now writes itself.