Is gpt-3.5-turbo-16k deprecated?

Q: Is gpt-3.5-turbo-16k deprecated?

Yes — deprecated. Retired 2026-10-23 — 8 days ago. Requests to this identifier are expected to fail.

DEPRECATED

Retired 2026-10-23 — 8 days ago. Requests to this identifier are expected to fail.

state=dead sunset=2026-10-23 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=2026-10-31 05:09Z

openai/gpt-3.5-turbo-16k

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	gpt-3.5-turbo-16k	16,385	4,096	$3	$4	2026-10-23
openrouter	openai/gpt-3.5-turbo-16k	16,385	4,096	$3	$4	—

Change history

Severity	Change	What	Detected
medium	removed	[one catalog only — litellm, openrouter still list it] openrouter/openai/gpt-3.5-turbo-16k is no longer listed by this source — calls to it are expected to fail	2026-10-09
low	modified	openrouter/openai/gpt-3.5-turbo-16k: capabilities gained function_calling, response_schema	2026-09-18
high	deprecated	gpt-3.5-turbo-16k: deprecation announced for 2026-10-23 — in 68 days	2026-08-16
high	deprecated	gpt-3.5-turbo-16k: retires 2026-10-23 (in 68 days)	2026-08-16