Claude Code now outruns Copilot roughly two to one in JetBrains' survey of 15,000 developers

JetBrains has published agent adoption figures from its Developer Ecosystem Survey 2026, which it describes as a globally representative survey of more than 15,000 professional developers, now in its tenth year ^[1]. Between May and July 2026, 90 percent of those developers used AI coding agents at work at least weekly and 68 percent used them daily ^[2], which moves the procurement question past whether and onto which one, and who owns the bill.

The lead has changed hands. Claude Code was used at work by about 39 percent of professional developers worldwide in May-July 2026, up from 18 percent in January 2026 ^[3], while GitHub Copilot slid to 21 percent from 29 percent a year earlier ^[4]. That is a ratio of roughly 1.9 to 1, which JetBrains rounds to "twice as often" ^[1][5], and a relative decline of about 28 percent for the tool JetBrains credits with bringing AI-assisted coding into the spotlight in 2023 ^[3][6]. In the United States, Claude Code sits at 47 percent ^[7].

The figure worth carrying into a planning meeting is conversion, not headline adoption. JetBrains reports that 31 percent of developers name Claude Code as their single most-used AI coding tool, an almost 80 percent conversion rate from regular workplace use ^[8]. Run the same arithmetic on the others: Copilot has 79 percent awareness against 21 percent adoption, about 27 percent ^[9][4], and Codex has 65 percent awareness against 16 percent adoption, about 25 percent ^[10][5]. Awareness is not the bottleneck. Displacing whatever the developer already opens is.

Codex is the one moving fastest from behind: 3 percent adoption in January to 16 percent in May-July, with awareness up from 27 percent to 65 percent ^[10][11]. Cursor went the other way, from 18 percent to 12 percent adoption even as mind share rose from 69 to 75 percent ^[12], a relative drop of about a third ^[6], with the steepest fall in China, from 28 to 16 percent ^[13]. Google Antigravity held at 6 percent adoption while awareness climbed from 29 to 47 percent, and reached 15 percent in India, up from 10 percent ^[14][15]. OpenCode, with no large vendor attached, is at 7 percent adoption and 42 percent mind share ^[16].

Note that the reported shares add to about 110 points across seven tools ^[7], so multi-agent workstations are the norm rather than the exception, and any policy written as a single-vendor standard will be honoured selectively. JetBrains has an obvious interest here: it says 39 percent of Copilot users run it inside JetBrains IDEs, roughly 8 percent of all developers ^[17][8], puts JetBrains AI and Junie at about 9 percent ^[18], and is shipping Air, an agentic development environment in preview, plus JetBrains Central as a control plane, with Claude Agent, Codex, Copilot and OpenCode wired into IDE chat and others reachable via the Agent Client Protocol ^[19][20]. The survey and the multiplexer are sold by the same company.

Watch whether Claude Code's roughly 80 percent conversion rate holds through the next reading, because that, not adoption, is what makes a seat renew. Watch Codex conversion specifically: awareness has already been solved, so the next six months test the product. And watch Copilot's floor, since 86 to 90 percent awareness in Europe, the UK and the US ^[9] plus enterprise distribution can hold a tool in place long after it stops being anyone's first choice.