Is claude-2.1 deprecated?

Q: Is claude-2.1 deprecated?

Yes — deprecated. Retired 2025-07-21 — 436 days ago. Requests to this identifier are expected to fail. The provider names claude-opus-4-8 as the replacement.

DEPRECATED

Retired 2025-07-21 — 436 days ago. Requests to this identifier are expected to fail. The provider names claude-opus-4-8 as the replacement.

state=dead sunset=2025-07-21 days_remaining=-436 severity=critical sources=docs evidence_tier=documentation confirmed_by_endpoint=false documented_by_provider=docs replacement=claude-opus-4-8 corroborated=single-source divergent_fields=none checked=2026-09-30 15:40Z

anthropic/claude-2.1

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
docs	claude-2.1	—	—	—	—	2025-07-21

Change history

Severity	Change	What	Detected
low	added	new model claude-2.1	2026-09-28
low	added	new model claude-2.1	2026-09-22
info	deprecated	claude-2.1: retires 2025-07-21 (376 days ago)	2026-08-01
low	added	new model claude-2.1	2026-08-01
medium	removed	[one catalog only — docs still list it] claude-2.1 is no longer listed by this source — calls to it are expected to fail	2026-08-01