2026 survey shows Claude Code adoption doubles to 39% of developers worldwide

The 2026 Developer Ecosystem Survey of 15,000 developers shows Claude Code became the dominant AI coding tool with 39% global adoption (47% in US), doubling since January. GitHub Copilot declined to 21% adoption while Codex grew 5x to 16%. Weekly AI coding agent usage reached 90% among professionals, with JetBrains AI tools used by 9% of developers.