Model thread

claude-mythos-5-1

model/anthropic-api:claude-mythos-5-1

Events

1

First event in the archive

19 September 2026 04:37 UTC observed

Last activity

19 September 2026 04:37 UTC observed

1. The anthropic-deprecations table records the tentative retirement date for "claude-mythos-5-1" as "Not sooner than September 1, 2027".

   retirement_floor 19 September 2026 04:37 UTC observed · anthropic-deprecations · 9fe0de6 · raw artifact at this commit

   modelclaude-mythos-5-1 labanthropic

   parsed floor date	2027-09-01