claude-mythos-preview (gated research preview) — Preview — shutdown 2027-04-02
For claude-mythos-preview (gated research preview), provider is Microsoft Azure / Foundry; shutdown / retirement date is 2027-04-02; platform / deployment scope is Microsoft Foundry, recorded from its source on 2026-09-09; source re-checked 2026-10-13.
- Provider
- Microsoft Azure / Foundry our reading
- Model ID / API name
- claude-mythos-preview (gated research preview) verified
- Human-readable model name
- claude-mythos-preview (gated research preview) verified
- Lifecycle status
- Preview verified
- Shutdown / retirement date
- 2027-04-02 verified
- Platform / deployment scope
- Microsoft Foundry our reading
Values marked our reading are our classification of what the source says — the source does not print them in those words. The quote below is the evidence for each one; judge it yourself.
What the source says
| claude-mythos-preview (gated research preview) | — | Preview | 2027-04-02 | — |
— learn.microsoft.com, retrieved 2026-09-09
Where each value comes from
The value above is stated away from the sentence quoted with the answer, so the passage that states it is shown here too.
Shutdown / retirement date
| Model | Version | Lifecycle | Retirement date | Replacement | | --- | --- | --- | --- | --- | | claude-sonnet-5 | 2 | GA | 2027-06-30 | — | | claude-sonnet-5 | 1 | GA | 2027-06-30 | — | | claude-sonnet-4-6 | 1 | GA | 2027-02-10 | — | | claude-sonnet-4-5 | 1 | GA | 2026-11-30 | claude-sonnet-5-5 | | claude-opus-5 | 2 | GA | 2027-07-08 | — | | claude-opus-5 | 1 | GA | 2027-07-08 | — | | claude-opus-4-8 | 2 | GA | 2027-09-01 | — | | claude-opus-4-8 | 1 | GA | 2027-09-01 | — | | claude-opus-4-7 | 1 | GA | 2027-04-06 | — | | claude-opus-4-6 | 1 | GA | 2027-02-02 | — | | claude-opus-4-5 | 1 | GA | 2026-11-24 | — | | claude-opus-4-1 | — | Retired | 2026-08-05 | claude-opus-5 | | claude-haiku-4-5 | 1 | GA | 2026-11-15 | — | | claude-haiku-4-5 | 2 | GA | 2026-11-15 | — | | claude-fable-5-1 | 1 | Preview | 2027-12-05 | — | | claude-fable-5 | 1 | Preview | 2027-12-05 | — | | claude-mythos-5-1 | 1 | Preview | — | — | | claude-mythos-preview (gated research preview) | — | Preview | 2027-04-02 | — |
— all from learn.microsoft.com, retrieved 2026-09-09
Source
- learn.microsoft.comhttps://learn.microsoft.com/en-us/azure/foundry/openai/concepts/model-retirement-schedule
This one changes, and we watch it.AI model deprecation and retirement dates by provider is re-read on a schedule and every change is dated. Subscribe: Atom feed · JSON · what has changed so far.