Phi

Microsoft · lightweight line · open weights

6 releases since 2023Latest: Phi-4-reasoning-vision

Where the line stands

How long it has been since the last release against the line's usual gap and its recent ones — the rhythm, not a date.

Microsoft · Phi line · lightweight · open weights

Due189 days since the last release — usual gap is 133

Days since last release

Phi-4-reasoning-vision · Mar 4, 2026

189

days

Usual gap

133

days

Recent gaps

Phi-4-reasoning-vision · Mar 2026

308

Phi-4-reasoning · Apr 2025

139

Phi-4 · Dec 2024

114

Phi-3.5 · Aug 2024

119

Newest first — what each version changed versus the one before, in Microsoft's own numbers.

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