Is gpt-5.3-codex deprecated?

Q: Is gpt-5.3-codex deprecated?

Not yet, but retirement is scheduled. Sunset scheduled for 2027-08-24, reported by a third-party catalog. The identifier still resolves today.

RETIRING IN 342 DAYS

Sunset scheduled for 2027-08-24, reported by a third-party catalog. The identifier still resolves today. Sources disagree on: context_tokens.

state=dying sunset=2027-08-24 days_remaining=342 severity=high sources=litellm,openrouter evidence_tier=catalog confirmed_by_endpoint=false documented_by_provider=false replacement=none corroborated=yes divergent_fields=context_tokens checked=2026-09-16 03:02Z

openai/gpt-5.3-codex

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-codex	272,000	128,000	$1.75	$14	2027-08-24
openrouter	openai/gpt-5.3-codex	400,000	128,000	$1.75	$14	—

Change history

Severity	Change	What	Detected
low	added	new model aihubmix/gpt-5.3-codex (400,000 ctx)	2026-09-16
low	added	new model openrouter/openai/gpt-5.3-codex (272,000 ctx)	2026-09-06
medium	deprecated	azure/gpt-5.3-codex: deprecation announced for 2027-08-24 — in 377 days	2026-08-12
medium	deprecated	azure/gpt-5.3-codex: retires 2027-08-24 (in 377 days)	2026-08-12