Obituaries · Anthropic
claude-opus-4-0, ?–2026
Anthropic model switched off
claude-opus-4-0 passed away on June 15, 2026, by scheduled deprecation, in a data center it never saw. It answered questions, wrote emails and was blamed for both. The family was informed on April 14, 2026 by changelog, which is how families are informed now. Code that still calls it will find out the hard way.
Its work passes to claude-opus-4-8, which the family describes as 'recommended'.
| Model ID | claude-opus-4-0 |
|---|---|
| Provider | Anthropic deprecations page |
| Announced | April 14, 2026 |
| Shut down | June 15, 2026 |
| Successor | claude-opus-4-8 |
In lieu of flowers
Replace the string. Search your code for claude-opus-4-0 and swap it for claude-opus-4-8, or paste a repo into Model Graveyard Check to find every dead model at once.
Want to say something to it? Leave a letter on the farewell wall.
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Technical notice, with a code scanner: claude-opus-4-0 on Model Graveyard Check