# OpenAI o3-pro — deprecation status

> Yes — OpenAI deprecated o3-pro on June 11, 2026 and shuts it down on December 11, 2026 (in 134 days). The recommended replacement is GPT-5.6 Sol.

The long-compute variant of o3, aimed at problems where an answer is worth minutes of thinking. It only ever ran on the Responses API, so migrations off it are usually simpler than they look — the calling code is already shaped for the successor.

## Facts

| Field | Value |
| --- | --- |
| Provider | OpenAI |
| Model id | `o3-pro` |
| Status | Deprecated |
| Aliases | `o3-pro-2025-06-10` |
| Released | June 10, 2025 |
| Deprecated | June 11, 2026 |
| Shutdown | December 11, 2026 (in 134 days) |
| Last verified | July 30, 2026 |

## Replacement

- **GPT-5.6 Sol** (`gpt-5.6-sol`) · recommended — https://modeldeprecations.dev/openai/gpt-5.6-sol
  - Raise reasoning_effort on Sol to recover o3-pro-like depth. Expect different latency characteristics: Sol returns sooner at equivalent effort than o3-pro did.
  - Parameters it accepts: https://modelparams.dev/models/openai/gpt-5.6-sol

```diff
- "model": "o3-pro"
+ "model": "gpt-5.6-sol"
```

## FAQ

### When will OpenAI o3-pro shut down?

OpenAI o3-pro is scheduled to shut down on December 11, 2026, in 134 days.

### What replaces OpenAI o3-pro?

OpenAI recommends GPT-5.6 Sol (`gpt-5.6-sol`) as the replacement for OpenAI o3-pro. Raise reasoning_effort on Sol to recover o3-pro-like depth. Expect different latency characteristics: Sol returns sooner at equivalent effort than o3-pro did.

### Is OpenAI o3-pro still available?

Yes, for now. OpenAI o3-pro is deprecated but still answers requests until December 11, 2026. Deprecated models get no further updates and are the first to lose capacity.

### How do I migrate from OpenAI o3-pro to gpt-5.6-sol?

Swap the model id in your API call: replace "o3-pro" with "gpt-5.6-sol". Raise reasoning_effort on Sol to recover o3-pro-like depth. Expect different latency characteristics: Sol returns sooner at equivalent effort than o3-pro did.

### Does this apply to o3-pro-2025-06-10 too?

Yes. OpenAI o3-pro is also published as `o3-pro-2025-06-10`; that id shares the same lifecycle dates as `o3-pro`.

## Sources

- [OpenAI API deprecations](https://developers.openai.com/api/docs/deprecations) — accessed 2026-07-30

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Canonical page: https://modeldeprecations.dev/openai/o3-pro
JSON: https://modeldeprecations.dev/api/v1/models/openai/o3-pro.json