# o4-mini-2025-04-16

> o4-mini-2025-04-16 (OpenAI): retired, retired 2026-10-23. Lifecycle notices from Microsoft Azure, OpenAI, each with its source.

Canonical: https://rewindex.com/models/o4-mini-2025-04-16
Last updated: 2026-10-16T04:00:00Z

- Maker: [OpenAI](https://rewindex.com/company/openai.md)
- Status: Retired · retired 2026-10-23

Built only from deprecation and shutdown notices collected by Dead Canary. A model is listed at a host when that host’s own notice names it. Retired = a shutdown date that has passed; Deprecated = any other deprecation or shutdown notice. Preview/GA status is not shown because these sources do not state it.

## Hosts

| Host | Status at host | Date | Notices |
| --- | --- | --- | --- |
| [Microsoft Azure](https://rewindex.com/company/azure.md) | Notice only (incl. fine-tuning notice) |  | 1 |
| [OpenAI](https://rewindex.com/company/openai.md) | Retired | 2026-10-23 | 1 |

## Lifecycle timeline

| Date | Host | Type | Notice | Source | Dead Canary |
| --- | --- | --- | --- | --- | --- |
| 2026-10-23 | OpenAI | shutdown | o4-mini-2025-04-16 | [vendor notice](https://platform.openai.com/docs/deprecations#2026-04-22-legacy-gpt-model-snapshots) | [event](https://deadcanary.io/event/openai-o4-mini-2025-04-16-5109/) |
| 2027-10-16 | Microsoft Azure | shutdown (fine-tuned deployments) | o4-mini-2025-04-16 (fine-tuned) | [vendor notice](https://learn.microsoft.com/en-us/azure/ai-services/openai/concepts/model-retirements#fine-tuned-models) | [event](https://deadcanary.io/event/azure-openai-o4-mini-2025-04-16-fine-tuned-156c/) |


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Canonical: https://rewindex.com/models/o4-mini-2025-04-16 · Markdown: https://rewindex.com/models/o4-mini-2025-04-16.md · JSON: https://rewindex.com/api/v1/models/o4-mini-2025-04-16 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-05T09:12:34.198Z