Is gemini-3.5-flash deprecated?

Q: Is gemini-3.5-flash deprecated?

Not yet, but retirement is scheduled. Sunset scheduled for 2027-05-19, reported by a third-party catalog. The identifier still resolves today.

RETIRING IN 245 DAYS

Sunset scheduled for 2027-05-19, reported by a third-party catalog. The identifier still resolves today. Sources disagree on: max_output_tokens.

state=dying sunset=2027-05-19 days_remaining=245 severity=high sources=gemini,litellm,openrouter evidence_tier=endpoint confirmed_by_endpoint=gemini documented_by_provider=false replacement=none corroborated=yes divergent_fields=max_output_tokens checked=2026-09-16 03:02Z

google/gemini-3.5-flash

Vendor: google. Tracked by 3 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
gemini native	gemini-3.5-flash	1,048,576	65,536	—	—	—
litellm	gemini-3.5-flash	1,048,576	65,535	$1.5	$9	2027-05-19
openrouter	google/gemini-3.5-flash	1,048,576	65,536	$1.5	$9	—

Change history

Severity	Change	What	Detected
low	added	new model openrouter/google/gemini-3.5-flash (1,048,576 ctx)	2026-09-06
low	added	new model deepinfra/google/gemini-3.5-flash (1,000,000 ctx)	2026-08-28
medium	deprecated	vertex_ai/gemini-3.5-flash: deprecation announced for 2027-05-19 — in 271 days	2026-08-21
medium	deprecated	gemini-3.5-flash: deprecation announced for 2027-05-19 — in 271 days	2026-08-21
medium	deprecated	gemini-3.5-flash: retires 2027-05-19 (in 271 days)	2026-08-21
medium	deprecated	vertex_ai/gemini-3.5-flash: retires 2027-05-19 (in 271 days)	2026-08-21
info	modified	[source artifact — 6 providers changed identically on the same day] gemini/gemini-3.5-flash: capabilities lost service_tier	2026-06-27
info	modified	[source artifact — 6 providers changed identically on the same day] vertex_ai/gemini-3.5-flash: capabilities lost service_tier	2026-06-27
info	modified	[source artifact — 6 providers changed identically on the same day] gemini-3.5-flash: capabilities lost service_tier	2026-06-27
low	added	new model gemini/gemini-3.5-flash (1,048,576 ctx)	2026-05-19
low	added	new model vertex_ai/gemini-3.5-flash (1,048,576 ctx)	2026-05-19
low	added	new model gemini-3.5-flash (1,048,576 ctx)	2026-05-19