39 percent professional usage, up 21 points since January. I use Claude Code daily, so I’m inside that number, and the honest reaction isn’t vindication — it’s a small alarm. Copilot went from 29 percent to 21 in the same window. That’s how fast the ground moves under a tool you’ve wired into your habits.
So my rule: keep the agent replaceable. Prompts and project notes live as plain files in the repo, not in a vendor’s session store. Anything that only works because one specific agent understands it is a liability. Codex went 3 to 16 percent, more than fivefold, which tells me the switching cost I pay later is set by decisions I make now. Portable context, boring formats.
The story — JetBrains’ Developer Ecosystem Survey 2026, collected May to July from 15,509 participants across eight languages, puts Claude Code at the top: 39 percent of developers use it professionally, rising to 47 percent in the US. GitHub Copilot follows at 21 percent, down from 29 in January; OpenAI Codex reached 16 percent. Both Claude Code and Copilot hit 79 percent global awareness. Coding agents are used weekly by 90 percent of developers, daily by 68. (Source)