Are AI coding assistants really writing 40% of all new code at major companies?

The answer

By 2025, AI coding assistants have moved from novelty to necessity across the software industry. GitHub reported that Copilot generates an average of 46% of code in files where it is active, with over 15 million developers using the tool. Amazon's internal AI coding assistant, Amazon Q (formerly CodeWhisperer), was reported to write over 40% of new code at Amazon itself, saving the company an estimated $260 million annually by automating code generation and review. Google reported that more than 25% of new code at the company is now generated by AI. A 2025 Pragmatic Engineer survey found 85% of professional developers use at least one AI coding tool regularly. Studies consistently show 30–55% faster task completion when developers use AI assistants, though engineers emphasize that human review remains critical - AI-generated code can contain subtle bugs, security vulnerabilities, and maintainability issues that require experienced judgment to catch.