Claude Code now used by 39% of devs, doubling GitHub Copilot
JetBrains ran its Developer Ecosystem Survey in April and May 2026, pulling responses from more than 15,000 developers worldwide. The early numbers on AI coding agent adoption are striking.
The headline stats
90% of professional developers now use AI coding agents at work at least weekly. 68% use them daily. This is no longer an experimental behavior.
The tool-level data is where things get interesting:
- Claude Code: jumped from 3% to 39% workplace adoption year over year
- GitHub Copilot: dropped from 29% to 21% in the same period
- OpenAI Codex: went from 0% to 16%, passing Cursor
- Cursor: held at 12% adoption across both surveys
Awareness of Claude Code and GitHub Copilot is now identical at 79%. But Copilot’s lead in actual usage has evaporated. JetBrains researcher Mikhail Bogdanov noted in the blog post that Claude Code is now used twice as often as Copilot at work.
US numbers run even higher
In the United States, Claude Code’s workplace adoption sits at 47%, according to the survey data. That is almost half of US developers using it on the job.
Codex is the dark horse
OpenAI Codex went from effectively zero to 16% workplace use. Awareness climbed from 11% to 65%. It now sits ahead of Cursor in actual use, even though Cursor still has higher awareness at 75%.
JetBrains’ own tools lost ground
JetBrains AI Assistant and Junie, its autonomous coding agent, both saw slight declines. Awareness fell from 57% to 51%, and usage dropped from 13% to 9%.
The full 2026 Developer Ecosystem Survey analysis has not been published yet. These numbers come from early results shared on the JetBrains blog.
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