Is o3-deep-research-2025-06-26 deprecated?

Q: Is o3-deep-research-2025-06-26 deprecated?

Yes — deprecated. Retired 2026-07-23 — 55 days ago. Requests to this identifier are expected to fail. The provider names gpt-5.6-sol as the replacement.

DEPRECATED

Retired 2026-07-23 — 55 days ago. Requests to this identifier are expected to fail. The provider names gpt-5.6-sol as the replacement.

state=dead sunset=2026-07-23 days_remaining=-55 severity=critical sources=docs,litellm evidence_tier=documentation confirmed_by_endpoint=false documented_by_provider=docs replacement=gpt-5.6-sol corroborated=yes divergent_fields=none checked=2026-09-16 03:02Z

openai/o3-deep-research-2025-06-26

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	o3-deep-research-2025-06-26	—	—	—	—	2026-07-23
litellm	o3-deep-research-2025-06-26	200,000	100,000	$10	$40	2026-07-23

Change history

Severity	Change	What	Detected
low	modified	o3-deep-research-2025-06-26: capabilities gained reasoning	2026-09-09
critical	deprecated	o3-deep-research-2025-06-26: deprecation announced for 2026-07-23 (date already passed)	2026-08-12
critical	deprecated	o3-deep-research-2025-06-26: retires 2026-07-23 (9 days ago)	2026-08-01
low	added	new model o3-deep-research-2025-06-26	2026-08-01