# How Much Code Do Developers Really Let AI Write? 2026 Global Developer Ecosystem Survey reveals AI-assisted coding adoption rates worldwide. - **Source:** [The JetBrains Blog](https://brifing.si/source/782eebd1-7be8-49cc-b27c-e552516691b2) - **Published:** 2026-08-26 - **Topic:** [Software & Engineering](https://brifing.si/c/engineering) - **Original article:** - **On Brifing:** https://brifing.si/s/0405a03b-aa01-4d9a-90a1-1e3d5ee5f839 ## The AI Coding Revolution According to the 2026 Global Developer Ecosystem Survey, professional developers on average let AI agents write 47% of their code entirely. 38% use some AI assistance, while only 27% code completely manually. The survey of over 15,000 professional developers conducted in May-July 2026 revealed that one in five developers no longer writes any code manually. ## Experience Matters Interestingly, senior developers are leading the charge in delegating coding to AI. A quarter of senior developers have AI write over 80% of their code, while juniors tend to prefer AI-assisted workflows. However, not all seniors follow this trend; adoption rates vary significantly within this group. ## Tool-Specific Differences There are notable differences among popular AI coding tools. 42% of Codex users have AI write over 80% of their code, compared to 32% of Claude Code users. 37% of Codex users don't write any code manually, a rate higher than users of other tools. Claude Code has become the industry standard with 39% workplace adoption. ## Tech Stack Impact Programming languages show significant variations in AI adoption. Go, JavaScript and TypeScript developers have AI write 54-55% of their code on average, while C and C++ developers have the lowest rate (38%). Java and Python developers fall in the middle with 48-51%. ## Regional Variations Geographical differences are striking. 32-35% of developers in China, Japan and South Korea have AI write the majority of their code, compared to about 16% in Europe and the UK. East Asia leads the world in AI-assisted coding adoption. ## Developer Segments Developers fall into three distinct profiles based on AI usage: Agentic coders (31%) have AI write 84% of their code on average. AI-assisted coders (47%) delegate 40% to AI, while manual coders (23%) write 75% themselves. ## Industry Transformation The rapid adoption of AI coding tools signals a major industry shift. Over half of all developers now write less than 20% of their code manually. Heavy users of tools like Claude Code and Codex are 46-57% agentic coders. ## Future Coding Practices Survey results show purely manual coding is quickly becoming obsolete. AI-assisted development workflows are becoming the new standard, with most developers adopting hybrid approaches. This transformation promises lasting changes in software development efficiency and methodology. ## Sources covering this story - https://blog.jetbrains.com/research/2026/08/how-much-code-do-developers-really-let-agents-write/ — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._