Is phi-4-reasoning deprecated?

Q: Is phi-4-reasoning deprecated?

Not yet, but retirement is scheduled. Sunset scheduled for 2027-01-17, reported by a third-party catalog. The identifier still resolves today.

RETIRING IN 78 DAYS

Sunset scheduled for 2027-01-17, reported by a third-party catalog. The identifier still resolves today.

state=dying sunset=2027-01-17 days_remaining=78 severity=high sources=litellm evidence_tier=catalog confirmed_by_endpoint=false documented_by_provider=false replacement=none corroborated=single-source divergent_fields=none checked=2026-10-31 05:09Z

microsoft/phi-4-reasoning

Vendor: microsoft. Tracked by 1 of 5 sources.

What each source reports

**endpoint** = the provider's own machine-readable API, the strongest evidence. **provider docs** = the provider's own documentation, read by a model — first-party content, inferred reading. Unlabelled rows are third-party catalogs. Where sources disagree both values are shown rather than silently reconciled.
Source	ID	Context	Max out	In $/Mtok	Out $/Mtok	Sunset
litellm	azure_ai/Phi-4-reasoning	32,768	4,096	$0.125	$0.5	2027-01-17

Change history

Severity	Change	What	Detected
high	deprecated	azure_ai/Phi-4-reasoning: deprecation announced for 2027-01-17 — in 86 days	2026-10-23
high	deprecated	azure_ai/Phi-4-reasoning: retires 2027-01-17 (in 86 days)	2026-10-23