Is claude-opus-5-5-fast deprecated?

Q: Is claude-opus-5-5-fast deprecated?

Not yet, but retirement is scheduled. Sunset scheduled for 2027-10-01, reported by a third-party catalog. The identifier still resolves today.

RETIRING IN 350 DAYS

Sunset scheduled for 2027-10-01, reported by a third-party catalog. The identifier still resolves today.

state=dying sunset=2027-10-01 days_remaining=350 severity=high sources=litellm evidence_tier=catalog confirmed_by_endpoint=false documented_by_provider=false replacement=none corroborated=single-source divergent_fields=none checked=2026-10-16 04:23Z

anthropic/claude-opus-5-5-fast

Vendor: anthropic. 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
litellm	azure_ai/claude-opus-5-5-fast	1,000,000	128,000	$8	$40	2027-10-01

Change history

Severity	Change	What	Detected
low	added	new model azure_ai/claude-opus-5-5-fast (1,000,000 ctx)	2026-10-15
medium	deprecated	azure_ai/claude-opus-5-5-fast: retires 2027-10-01 (in 351 days)	2026-10-15