Is deepseek-v4.1-flash deprecated?

Q: Is deepseek-v4.1-flash deprecated?

No — still supported. Listed by openrouter. No retirement date announced. Neither the provider's API nor its documentation has been checked for this model.

NOT DEPRECATED

Listed by openrouter. No retirement date announced. Neither the provider's API nor its documentation has been checked for this model.

state=alive sunset=none days_remaining=n/a severity=low sources=openrouter evidence_tier=catalog confirmed_by_endpoint=false documented_by_provider=false replacement=none corroborated=single-source divergent_fields=none checked=2026-09-10 14:50Z

deepseek/deepseek-v4.1-flash

Vendor: deepseek. 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
openrouter	deepseek/deepseek-v4.1-flash	1,048,576	384,000	$0.15	$0.6	—

Change history

Severity	Change	What	Detected
low	modified	deepseek/deepseek-v4.1-flash: capabilities gained logit_bias, min_p, repetition_penalty, seed, structured_outputs, top_k	2026-09-10
info	repriced	deepseek/deepseek-v4.1-flash: input_price_per_mtok $0.30/Mtok to $0.15/Mtok	2026-09-10
info	repriced	deepseek/deepseek-v4.1-flash: output_price_per_mtok $1.20/Mtok to $0.60/Mtok	2026-09-10
info	repriced	deepseek/deepseek-v4.1-flash: cache_read_price_per_mtok $0.0060/Mtok to $0.0030/Mtok	2026-09-10
low	added	new model deepseek/deepseek-v4.1-flash (1,048,576 ctx)	2026-09-10