Microsoft AI
Microsoft is the largest commercial deployer of AI through its Azure OpenAI Service, Copilot products, and GitHub Copilot. Its $13 billion investment in OpenAI gives it exclusive rights to deploy OpenAI's models commercially. In parallel, Microsoft Research developed the Phi series of small language models (Phi-1 through Phi-4), which demonstrate that models of 3–14 billion parameters can approach the reasoning performance of much larger models when trained on carefully curated data. Microsoft's Responsible AI Standard is one of the most detailed internal governance frameworks published by any technology company and has influenced EU AI Act compliance guidance. Its position as both AI developer and the world's largest enterprise software company gives it structural influence over how AI governance requirements are operationalised in practice.
AI Models
Phi-4
Released in December 2024, Phi-4 is a 14-billion-parameter model from Microsoft Research that achieves GPT-4o-level performance on STEM reasoning benchmarks. It was trained on carefully curated synthetic data — an intentional design choice to demonstrate that data quality can substitute for data quantity. Phi-4 is open-weight (available on Hugging Face) and can run on consumer hardware. It represents Microsoft's small language model research track, distinct from its Azure OpenAI commercial track.