RETIRING IN 311 DAYS
Sunset scheduled for 2027-09-01, published in the provider's own documentation. The identifier still resolves today.
state=dying sunset=2027-09-01 days_remaining=311 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 16:51Z
anthropic/claude-mythos-5-1
Vendor: anthropic. Tracked by 2 of 5 sources.
What each source reports
| Source | ID | Context | Max out | In $/Mtok | Out $/Mtok | Sunset |
|---|---|---|---|---|---|---|
| docs | claude-mythos-5-1 | — | — | — | — | 2027-09-01 |
| litellm | anthropic.claude-mythos-5-1 | 1,000,000 | 128,000 | $10 | $50 | — |
Change history
| Severity | Change | What | Detected |
|---|---|---|---|
| low | added | new model claude-mythos-5-1 | 2026-10-21 |
| low | added | new model anthropic.claude-mythos-5-1 (1,000,000 ctx) | 2026-09-24 |
| low | added | new model global.anthropic.claude-mythos-5-1 (1,000,000 ctx) | 2026-09-24 |
| low | added | new model us.anthropic.claude-mythos-5-1 (1,000,000 ctx) | 2026-09-24 |
| low | modified | claude-mythos-5-1: capabilities gained anthropic_compaction | 2026-09-22 |
| low | added | new model claude-mythos-5-1 (1,000,000 ctx) | 2026-09-06 |
| medium | deprecated | claude-mythos-5-1: retires 2027-09-01 (in 360 days) | 2026-09-06 |