Is o1-preview deprecated?

Q: Is o1-preview deprecated?

Yes — deprecated. Retired 2025-07-28 — 370 days ago. Requests to this identifier are expected to fail. The provider names o3 as the replacement.

DEPRECATED

Retired 2025-07-28 — 370 days ago. Requests to this identifier are expected to fail. The provider names o3 as the replacement.

state=dead sunset=2025-07-28 days_remaining=-370 severity=critical sources=docs,litellm evidence_tier=documentation confirmed_by_endpoint=false documented_by_provider=docs replacement=o3 corroborated=yes divergent_fields=none checked=2026-08-02 01:41Z

openai/o1-preview

Vendor: openai. Tracked by 2 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
docs	o1-preview	—	—	—	—	2025-07-28
litellm	azure/o1-preview	128,000	32,768	$15	$60	—

Change history

Severity	Change	What	Detected
info	deprecated	o1-preview: retires 2025-07-28 (369 days ago)	2026-08-01
low	added	new model o1-preview	2026-08-01