# OpenAI GPT-4o Realtime preview — deprecation status

> Yes — GPT-4o Realtime preview is retired. OpenAI deprecated it on September 15, 2025 and shut it down on May 7, 2026; API requests to it now fail. The recommended replacement is GPT Realtime 1.5.

The model that introduced speech-to-speech over a WebSocket, with interruption handling and sub-second response — the first time a voice agent could be built without stitching together transcription, a chat model and text-to-speech. It stayed a preview for its entire eighteen-month life.

## Facts

| Field | Value |
| --- | --- |
| Provider | OpenAI |
| Model id | `gpt-4o-realtime-preview` |
| Status | Retired |
| Aliases | `gpt-4o-realtime-preview-2025-06-03`, `gpt-4o-realtime-preview-2024-12-17` |
| Released | October 1, 2024 |
| Deprecated | September 15, 2025 |
| Shutdown | May 7, 2026 (84 days ago) |
| Last verified | July 30, 2026 |

## Replacement

- **GPT Realtime 1.5** (`gpt-realtime-1.5`) · recommended — https://modeldeprecations.dev/openai/gpt-realtime-1.5
  - The session event schema changed between preview and GA. Expect to update event handlers, not just the model id.
  - Parameters it accepts: https://modelparams.dev/models/openai/gpt-realtime-1.5

```diff
- "model": "gpt-4o-realtime-preview"
+ "model": "gpt-realtime-1.5"
```

## FAQ

### When did OpenAI GPT-4o Realtime preview shut down?

OpenAI GPT-4o Realtime preview shut down on May 7, 2026. API requests to it fail from that date onward.

### What replaces OpenAI GPT-4o Realtime preview?

OpenAI recommends GPT Realtime 1.5 (`gpt-realtime-1.5`) as the replacement for OpenAI GPT-4o Realtime preview. The session event schema changed between preview and GA. Expect to update event handlers, not just the model id.

### Is OpenAI GPT-4o Realtime preview still available?

No. OpenAI GPT-4o Realtime preview is retired and no longer served — it was shut down on May 7, 2026. Calls to it return an error.

### How do I migrate from OpenAI GPT-4o Realtime preview to gpt-realtime-1.5?

Swap the model id in your API call: replace "gpt-4o-realtime-preview" with "gpt-realtime-1.5". The session event schema changed between preview and GA. Expect to update event handlers, not just the model id.

### Does this apply to gpt-4o-realtime-preview-2025-06-03 too?

Yes. OpenAI GPT-4o Realtime preview is also published as `gpt-4o-realtime-preview-2025-06-03`, `gpt-4o-realtime-preview-2024-12-17`; those ids share the same lifecycle dates as `gpt-4o-realtime-preview`.

## 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/gpt-4o-realtime-preview
JSON: https://modeldeprecations.dev/api/v1/models/openai/gpt-4o-realtime-preview.json