Is hermes-4-405b deprecated?

Q: Is hermes-4-405b deprecated?

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

NOT DEPRECATED

Listed by litellm, openrouter. No retirement date announced. Neither the provider's API nor its documentation has been checked for this model. Sources disagree on: max_output_tokens.

state=alive sunset=none days_remaining=n/a severity=low sources=litellm,openrouter evidence_tier=catalog confirmed_by_endpoint=false documented_by_provider=false replacement=none corroborated=yes divergent_fields=max_output_tokens checked=2026-10-31 05:09Z

nousresearch/hermes-4-405b

Vendor: nousresearch. 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	nebius/NousResearch/Hermes-4-405B	131,072	131,072	$1	$3	—
openrouter	nousresearch/hermes-4-405b	131,072	117,964	$1	$3	—

Change history

Severity	Change	What	Detected
info	repriced	nousresearch/hermes-4-405b: cache_read_price_per_mtok n/a to $0.20/Mtok	2026-10-27
low	modified	nousresearch/hermes-4-405b: capabilities gained logprobs, structured_outputs, top_logprobs	2026-10-16
medium	removed	[one catalog only — litellm, openrouter still list it] openrouter/nousresearch/hermes-4-405b is no longer listed by this source — calls to it are expected to fail	2026-10-10
low	added	new model openrouter/nousresearch/hermes-4-405b (131,072 ctx)	2026-09-18
low	added	new model nebius/NousResearch/Hermes-4-405B (131,072 ctx)	2026-09-06