Claude Code Went From Zero to #1 in Eight Months. Here's What That Tells Us.
GitHub Copilot held the top spot for years. Then Claude Code launched in May 2025, and by 2026 it was leading on adoption, satisfaction, and loyalty. How did that happen?
Claude Code launched in May 2025 and is already the most-used AI coding tool by developers who actually use AI heavily at work. CSAT of 91%, NPS of 54. GitHub Copilot had years of head start. What happened?