Four Claude models Anthropic has switched off still answer on Google's and Amazon's clouds — one of them for half a year

A model's death date depends on where you rent it. Anthropic's own deprecation page states it plainly: the dates published there apply only to platforms Anthropic operates itself — the Claude API, Claude Platform on AWS and Microsoft Foundry. "Partner-operated platforms (Amazon Bedrock and Google Cloud) set their own retirement schedules, so a model's lifecycle status and dates can differ." They do differ. Comparing Anthropic's retirement table with the model tables the same company publishes for Google Cloud and for Amazon Bedrock gives a result that no single page states: of the five Claude models retired on Anthropic's own API, four are still listed as merely deprecated — that is, still working — on at least one partner cloud. - **Claude Haiku 3.5** — retired on the Claude API on 19 February 2026, 179 days ago. Still deprecated, not retired, on both Google Cloud and Amazon Bedrock. - **Claude Sonnet 4** — retired on the Claude API on 15 June 2026. Still deprecated on both clouds. - **Claude Opus 4.1** — retired on the Claude API on 5 August 2026, twelve days ago. Still deprecated on both clouds. - **Claude Opus 4** — retired on the Claude API and retired on Bedrock, but still deprecated on Google Cloud. - **Claude Sonnet 3.7** — the only one gone everywhere: retired on the Claude API, on Bedrock and on Google Cloud alike. For a developer this cuts both ways. A team that pinned its work to Claude Haiku 3.5 and calls it through Bedrock or Vertex has had six extra months of service that a team calling the Claude API directly lost in February. The same asymmetry is a trap in the other direction: a migration plan built from Anthropic's dates says nothing about when Google or AWS will pull the plug, and neither cloud is obliged to match Anthropic's notice period of at least 60 days. The practical consequence is that "is this model retired?" is not a question with one answer. It has three, and only the platform you actually bill through can give you yours. wujec.ai records the producer's own date in each profile, because that is the one date the vendor commits to publicly — the cloud tables have to be read separately, and they are the ones that move.