Is gpt-5.3-chat deprecated?

Q: Is gpt-5.3-chat deprecated?

Not yet, but retirement is scheduled. Sunset scheduled for 2026-08-10, reported by a third-party catalog. The identifier still resolves today.

RETIRING IN 8 DAYS

Sunset scheduled for 2026-08-10, reported by a third-party catalog. The identifier still resolves today.

state=dying sunset=2026-08-10 days_remaining=8 severity=critical sources=litellm,openrouter evidence_tier=catalog confirmed_by_endpoint=false documented_by_provider=false replacement=none corroborated=yes divergent_fields=none checked=2026-08-02 01:41Z

openai/gpt-5.3-chat

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
litellm	azure/gpt-5.3-chat	128,000	16,384	$1.75	$14	—
openrouter	openai/gpt-5.3-chat	128,000	16,384	$1.75	$14	2026-08-10

Change history

Severity	Change	What	Detected
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