Is claude-mythos-5 deprecated?

Q: Is claude-mythos-5 deprecated?

Not yet, but retirement is scheduled. Sunset scheduled for 2027-06-09, published in the provider's own documentation. The identifier still resolves today.

RETIRING IN 227 DAYS

Sunset scheduled for 2027-06-09, published in the provider's own documentation. The identifier still resolves today.

state=dying sunset=2027-06-09 days_remaining=227 severity=high sources=docs,litellm evidence_tier=documentation confirmed_by_endpoint=false documented_by_provider=docs replacement=none corroborated=yes divergent_fields=none checked=2026-10-25 22:52Z

anthropic/claude-mythos-5

Vendor: anthropic. 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
docs	claude-mythos-5	—	—	—	—	2027-06-09
litellm	claude-mythos-5	1,000,000	128,000	$10	$50	—

Change history

Severity	Change	What	Detected
low	added	new model claude-mythos-5	2026-10-21
medium	deprecated	claude-mythos-5: retires 2027-06-09 (in 231 days)	2026-10-21
low	added	new model us.anthropic.claude-mythos-5 (1,000,000 ctx)	2026-09-24
low	modified	claude-mythos-5: capabilities gained anthropic_compaction	2026-09-22
low	modified	claude-mythos-5: capabilities gained mid_conversation_system, native_structured_output	2026-08-21
low	added	new model claude-mythos-5 (1,000,000 ctx)	2026-08-12