Is gpt-5.3-chat deprecated?

Q: Is gpt-5.3-chat deprecated?

Yes — deprecated. Retired 2026-06-29 — 79 days ago. Requests to this identifier are expected to fail.

DEPRECATED

Retired 2026-06-29 — 79 days ago. Requests to this identifier are expected to fail.

state=dead sunset=2026-06-29 days_remaining=-79 severity=critical sources=litellm evidence_tier=catalog confirmed_by_endpoint=false documented_by_provider=false replacement=none corroborated=single-source divergent_fields=none checked=2026-09-16 03:02Z

openai/gpt-5.3-chat

Vendor: openai. 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/gpt-5.3-chat	128,000	16,384	$1.75	$14	2026-06-29

Change history

Severity	Change	What	Detected
info	deprecated	azure/gpt-5.3-chat: deprecation announced for 2026-06-29 (date already passed)	2026-08-12
info	deprecated	azure/gpt-5.3-chat: retires 2026-06-29 (44 days ago)	2026-08-12
medium	removed	[one catalog only — litellm still list it] openai/gpt-5.3-chat is no longer listed by this source — calls to it are expected to fail	2026-08-10
high	modified	openai/gpt-5.3-chat: capabilities lost max_completion_tokens	2026-08-08
critical	deprecated	openai/gpt-5.3-chat: retires 2026-08-10 (in 9 days)	2026-08-01
info	modified	[source artifact — 6 providers changed identically on the same day] azure/gpt-5.3-chat: capabilities lost service_tier	2026-06-27