JetBrains 2026 survey: Claude Code leads at 39%, Copilot slips to 21%
JetBrains' annual survey: 90% of pro devs use an AI agent weekly, 68% daily. Codex quintupled to 16%, Cursor slipped, and OSS agents are now real.
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AI agents are now the default
JetBrains' Developer Ecosystem Survey 2026 finds 90% of professional developers use an AI coding agent at least weekly and 68% use one every day. Not using one is now the exception, not the experiment.
Claude Code runs away with it
Claude Code is the most-used tool at roughly 39% of developers worldwide (47% in the US) and the primary tool for 31% — nearly double GitHub Copilot's share. If you're betting on one ecosystem to invest skills and plugins in, that's where the gravity is.
Codex surged; Copilot and Cursor slid
Codex jumped from 3% adoption in January to 16% by mid-year, awareness climbing from 27% to 65%. GitHub Copilot fell from 29% to 21% and Cursor from 18% to 12%. The pecking order is reshuffling fast — worth a re-evaluation if you standardized a year ago.
Open-source agents are on the board
OpenCode reached 7% adoption, Google's Antigravity 6%, and JetBrains' own AI/Junie about 9%. Self-hostable agents are now a measurable option, not just a hobbyist footnote.
Elsewhere: OneCLI's YC launch keeps keys out of agents
OneCLI made its YC S26 Launch HN as an open-source, Rust credential gateway: agents run on placeholder keys while the gateway injects the real ones at the network layer, so a prompt-injected model can't leak secrets or exceed policy. Each agent gets its own VM; Apache-2.0 and self-hostable for free.
Elsewhere: Go 1.27 ships
Go 1.27 landed with generic methods, a stricter encoding/json/v2, native UUIDs, roughly 30% cheaper small-object allocations, and post-quantum ML-DSA signatures — quietly useful if you write AI backends in Go.