John Langford leaves Microsoft, criticizing its AI research priorities

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Windows Latest reports on November 14, 2026 that AI Frontiers co-founder John Langford left Microsoft after its move into Microsoft AI. Langford says his research had no path to use and criticizes the division’s emphasis on scaling. The article discusses his Full Bandwidth Transformer work; halving training and inference costs is his projection, not a demonstrated commercial saving. The report says Microsoft had not publicly responded; its lab page says AI Frontiers is now part of Microsoft AI and continues frontier research.

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