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Microsoft introduces 14-billion-parameter Phi-4

Microsoft introduced Phi-4, a 14-billion-parameter reasoning model trained with synthetic and curated data and made available through Azure AI Foundry under a research release.

CURRENT ASSESSMENT · REVISION 1
TOWARD DOOM57confidence 99/100

Why it moved the index

A compact model delivered strong mathematical and reasoning performance at materially lower serving requirements and entered Azure AI Foundry. The immutable model card establishes the exact Phi-4 identity and release date.

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Assessment history

  1. R1
    Toward 57 · confidence 99

    New December 2024 exact compact reasoning model with no durable identity collision.

    12 Aug 2026