The feed
Every model retirement, and when
6 models have a published retirement date. These are the providers' own dates, read from their deprecation pages on and grouped by the day each one takes effect.
A calendar, not a verdict. It tells you when the work falls due, not whether the model you move to will behave like the one you left.
A model that is not on this list has no date.
This is every retirement the four providers have published, and nothing else. If you do not find a model here, what that tells you is that its provider has announced no shutdown date for it - not that it is staying as it is.
That gap is where the unpinned aliases sit. An id like gpt-4o or claude-sonnet-4-5 is a pointer rather than a version: it carries no retirement date because the provider can move it to a new snapshot instead, with no notice and no deadline for you to plan against. Those never appear below, and they are the ones with no date to give you.
Still to come, as at 2 Sept 2026
Nothing ahead of that date on anthropic's page. That is a statement about what has been published, not about what is stable.
Already retired
These dates have passed. They are here because a call to one of them is a more urgent problem than any date still to come, and because a model leaving a provider's page has never meant it came back.
5 Aug 2026
1 model| Model | Provider | Pinning | Read from | Replacement |
|---|---|---|---|---|
| claude-opus-4-1-20250805 | anthropic | pinned | sourceconfirmed 2 Sept 2026 | anthropic suggests claude-opus-4-8 - their recommendation, not ours, and a drop-in replacement is a claim that needs testing. |
15 Jun 2026
2 models| Model | Provider | Pinning | Read from | Replacement |
|---|---|---|---|---|
| claude-opus-4-20250514 | anthropic | pinned | sourceconfirmed 2 Sept 2026 | anthropic suggests claude-opus-4-8 - their recommendation, not ours, and a drop-in replacement is a claim that needs testing. |
| claude-sonnet-4-20250514 | anthropic | pinned | sourceconfirmed 2 Sept 2026 | anthropic suggests claude-sonnet-4-6 - their recommendation, not ours, and a drop-in replacement is a claim that needs testing. |
20 Apr 2026
1 model| Model | Provider | Pinning | Read from | Replacement |
|---|---|---|---|---|
| claude-3-haiku-20240307 | anthropic | pinned | sourceconfirmed 2 Sept 2026 | anthropic suggests claude-haiku-4-5-20251001 - their recommendation, not ours, and a drop-in replacement is a claim that needs testing. |
19 Feb 2026
2 models| Model | Provider | Pinning | Read from | Replacement |
|---|---|---|---|---|
| claude-3-5-haiku-20241022 | anthropic | pinned | sourceconfirmed 2 Sept 2026 | anthropic suggests claude-haiku-4-5-20251001 - their recommendation, not ours, and a drop-in replacement is a claim that needs testing. |
| claude-3-7-sonnet-20250219 | anthropic | pinned | sourceconfirmed 2 Sept 2026 | anthropic suggests claude-sonnet-4-6 - their recommendation, not ours, and a drop-in replacement is a claim that needs testing. |
To find which of these you are running, paste your model ids. It reads what you give it and matches against this same feed, in your browser.