AI writes up to 30% of Microsoft, Google code; Meta predicts 50% soon
NEW YORK, UNITED STATES — Artificial intelligence is transforming software development at the world’s largest tech companies, with executives at Microsoft, Google, and Meta revealing that AI now writes a significant share of their code – and that share is set to grow even further.
Microsoft CEO Satya Nadella announced that AI is responsible for between 20% and 30% of the code in some of the company’s projects. “The agents we have for reviewing code – that usage has increased,” Nadella said at Meta’s LlamaCon 2025 conference, highlighting how AI is being woven into the entire software development cycle, from code generation to review.
Google is seeing a similar trend. CEO Sundar Pichai told investors during Alphabet’s recent earnings call that AI now writes over 30% of new code at the company, up from 25% just six months ago.
“We are deploying these deeper flows across all parts of the company,” Pichai said, describing strong momentum in AI-assisted coding across Google’s engineering teams.
Meta predicts AI will soon handle half its coding
Meta is poised to follow suit. While CEO Mark Zuckerberg did not provide a current percentage, he predicted that “in the next year, probably, maybe half the development is going to be done by AI as opposed to people, and then that will just increase from there.”
For now, Meta uses AI in targeted areas like ad ranking and feed experiments, but is actively building AI agents to help write and test code for its Llama models.
Zuckerberg’s vision is bold: “AI will soon write your apps, not humans,” he said at LlamaCon, betting that open-source AI will drive innovation and reshape software engineering.
Industry impact: Productivity gains and workforce shifts
The move toward AI-generated code isn’t limited to these giants. Salesforce CEO Marc Benioff recently said AI has boosted engineering productivity by 30%, prompting the company to pause hiring new engineers in 2025.
Payments company Stripe has also laid off hundreds of employees, including engineers, as part of a broader restructuring influenced by automation trends.
Despite fears of job losses, experts say AI is more likely to change the nature of software work than eliminate it entirely. Microsoft, for example, is focusing layoffs on middle managers and non-coders, aiming to increase the share of employees who write code.
Microsoft CTO Kevin Scott expects the trend to accelerate: “Within five years, 95% of all code will be AI-generated. Very little is going to be line-by-line human-written code,” he said recently, while emphasizing that humans will remain essential for setting high-level goals and software design.
