Is union-alpha deprecated?

Q: Is union-alpha deprecated?

Not yet, but retirement is scheduled. Sunset scheduled for 2098-12-31, reported by a third-party catalog. The identifier still resolves today.

RETIRING IN 26404 DAYS

Sunset scheduled for 2098-12-31, reported by a third-party catalog. The identifier still resolves today.

state=dying sunset=2098-12-31 days_remaining=26404 severity=high sources=openrouter evidence_tier=catalog confirmed_by_endpoint=false documented_by_provider=false replacement=none corroborated=single-source divergent_fields=none checked=2026-09-16 15:03Z

stealth/union-alpha

Vendor: stealth. 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	stealth/union-alpha	262,144	131,072	$0	$0	2098-12-31

Change history

Severity	Change	What	Detected
low	added	new model stealth/union-alpha (262,144 ctx)	2026-09-16
medium	deprecated	stealth/union-alpha: retires 2098-12-31 (in 26404 days)	2026-09-16