San Francisco has deployed Microsoft 365 Copilot Chat, an artificial-intelligence assistant powered by OpenAI’s GPT-4o, to roughly 30,000 municipal employees across all departments, Mayor Daniel Lurie announced on Monday. The move follows a six-month pilot involving more than 2,000 workers—including 311 call-center staff—that the city says boosted individual productivity by as much as five hours a week. City officials expect the tool to automate tasks such as drafting reports, analyzing data and translating the more than 42 languages spoken by residents, allowing nurses, social workers and other frontline staff to focus on direct services. The rollout is covered by San Francisco’s existing enterprise agreement with Microsoft, meaning no incremental cost to taxpayers, according to the mayor’s office. Lurie described the adoption as part of a broader effort to position San Francisco as a model for responsible use of generative AI in the public sector. With the launch, the city becomes one of the largest local governments worldwide to integrate large-language-model technology at scale.