"The survey found that 32% of senior developers - those with 10 or more years of experience-reported that more than half of their shipped code was AI-generated, compared to 13% of junior developers. These figures are company claims based on the survey conducted by Fastly. The survey examined popular AI coding tools, including GitHub Copilot, OpenAI Gemini, and Anthropic Claude. Senior developers appear more willing to trust AI in production environments, while junior developers often exercise more caution."
"Despite the benefits of AI, developers frequently make edits to AI-generated code. Nearly 30% of senior developers reported that they edited AI code often enough to offset most of the time savings, compared to 17% of junior developers. However, 59% of senior developers said AI tools helped them ship code faster, versus 49% of junior developers."
"One senior developer noted that AI "bench-tests code and finds errors faster than a human, repairing them seamlessly in many instances." A junior developer highlighted that AI sometimes misinterprets their intent, requiring manual correction. These responses illustrate that AI can increase efficiency, but human oversight is still essential."
Fastly surveyed 791 professional developers in July 2025 about AI use in software development. The survey found 32% of senior developers (10+ years experience) reported that more than half of their shipped code was AI-generated, versus 13% of junior developers. Popular tools included GitHub Copilot, OpenAI Gemini, and Anthropic Claude. Senior developers showed greater willingness to trust AI in production. Nearly 30% of senior developers said they edited AI-generated code enough to offset most time savings, compared to 17% of junior developers. Overall, 59% of senior developers reported faster shipping with AI versus 49% of juniors.
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