Y Combinator CEO Garry Tan Praises Claude Code: AI Tool Keeps Him Up All Night

• Y Combinator CEO Garry Tan stayed up until 5 AM, working 19 hours straight, due to his addiction to Anthropic's new AI coding tool, Claude Code.
• Claude Code, launched in October 2025, is an AI-powered coding tool that runs directly in the terminal, allowing developers to use natural language commands for coding tasks.
• Its key strength is understanding entire codebases, enabling it to add features, fix bugs, write tests, manage commits, and assist with pull requests, integrating seamlessly into existing workflows.
• The software development industry is undergoing a major shift, with AI moving from a supporting role to a central position in code creation and maintenance by early 2026.
• Experts like Ryan Dahl, creator of Node.js, suggest that traditional line-by-line coding is becoming obsolete, with developers' roles evolving towards higher-level thinking, design, and architecture.

Why It Matters: AI coding tools like Claude Code are rapidly transforming software development, shifting engineers' roles towards strategic oversight.