John Langford, a veteran machine-learning researcher, has announced that he is joining Core Automation after leaving Microsoft. In a November 12, 2026, public post, Langford said he was drawn to a research environment willing to try new ideas. Core Automation publicly welcomed his move.
The announcement follows Langford’s October 31 statement that he had left Microsoft the previous day after 14.5 years. In a November 6 blog post titled “The End of AI Frontiers,” he described a disagreement over research priorities after a team he helped organize was moved into Microsoft AI.
Langford said the AI Frontiers group was created inside Microsoft Research in 2023 to bring greater coordination to experimental AI research. He estimated its size at roughly 50 people and highlighted work on the AutoGen agent framework, the Fara computer-use agent, and experimental approaches to developing more capable AI models.
According to Langford, AI Frontiers was reorganized into Microsoft AI in early September 2026. A September 14 update on Microsoft’s research website confirms the transfer and says the team would continue frontier research into AI agents and models.
In his personal account, Langford criticized the approach of Microsoft AI’s former Inflection leadership as focused on “scaling, and aggressively not research.” He argued that the shift limited opportunities for his team’s work to be seriously considered or put into use. His criticism reflects his experience and does not establish Microsoft’s company-wide research policy.
Langford wrote that AI Frontiers was “over” and said other members of its founding leadership appeared to have reached similar conclusions. He did not provide a complete list of departures or say that all of the group’s roughly 50 people had left Microsoft.
Microsoft’s public September statement presents a different characterization: AI Frontiers was being incorporated into a larger division while continuing its research goals. That statement does not address Langford’s later criticism or confirm that the entire lab was shut down.
On its official website, Core Automation says it is exploring new learning algorithms and the automation of AI research, rather than relying solely on increasingly large models and datasets. Langford has identified the company as his next destination, although his specific title and responsibilities were not stated in the public announcements.
For the AI research community, the departure highlights a debate over the balance between scaling existing techniques and pursuing different model designs. Neither Langford’s statements nor Microsoft’s September update establishes a change to Copilot or other Microsoft products, or a timetable for individual AI Frontiers projects.
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