claude-model-retirement-date-aug-2026

IN premise — entries/2026/06/21/wiki-Claude_language_model-chunk-2.md

Created 2026-06-21T09:50:09+00:00

At least one Claude model is scheduled for retirement on August 5, 2026.

Summary

Some Claude models will be shut down on August 5, 2026, meaning anything built on those specific models will need to be migrated or rebuilt before that date. This is a hard deprecation deadline, not a soft deprecation, so there is no grace period to plan around.

Dependents

These beliefs depend on this one:

IN anthropic-has-comprehensive-model-lifecycle-policy — Anthropic maintains a structured model lifecycle that distinguishes between deprecation (models still accessible with restrictions) and retirement (scheduled removal from service), with at least one model scheduled for retirement in August 2026. Deprecated models remain available to paid subscribers and via API by request. Anthropic also preserves weights of retired models as a precaution in case models have morally relevant preferences, conducting exit interviews before retirement.