# OpenAI GPT-4.1 nano — deprecation status

> Yes — OpenAI deprecated GPT-4.1 nano on April 22, 2026 and shuts it down on October 23, 2026 (in 85 days). The recommended replacement is GPT-5.6 Luna.

The cheapest model of the GPT-4.1 generation, and the only member of that family to be deprecated so far — gpt-4.1 and gpt-4.1-mini remain active. It was a common choice for classification and routing at high volume.

## Facts

| Field | Value |
| --- | --- |
| Provider | OpenAI |
| Model id | `gpt-4.1-nano` |
| Status | Deprecated |
| Aliases | `gpt-4.1-nano-2025-04-14` |
| Released | April 14, 2025 |
| Deprecated | April 22, 2026 |
| Shutdown | October 23, 2026 (in 85 days) |
| Last verified | July 30, 2026 |

## Replacement

- **GPT-5.6 Luna** (`gpt-5.6-luna`) · recommended — https://modeldeprecations.dev/openai/gpt-5.6-luna
  - Fine-tuned gpt-4.1-nano deployments are directed to gpt-5.4-nano instead; a fine-tune does not transfer and has to be re-run on the new base.
  - Parameters it accepts: https://modelparams.dev/models/openai/gpt-5.6-luna

```diff
- "model": "gpt-4.1-nano"
+ "model": "gpt-5.6-luna"
```

## FAQ

### When will OpenAI GPT-4.1 nano shut down?

OpenAI GPT-4.1 nano is scheduled to shut down on October 23, 2026, in 85 days.

### What replaces OpenAI GPT-4.1 nano?

OpenAI recommends GPT-5.6 Luna (`gpt-5.6-luna`) as the replacement for OpenAI GPT-4.1 nano. Fine-tuned gpt-4.1-nano deployments are directed to gpt-5.4-nano instead; a fine-tune does not transfer and has to be re-run on the new base.

### Is OpenAI GPT-4.1 nano still available?

Yes, for now. OpenAI GPT-4.1 nano is deprecated but still answers requests until October 23, 2026. Deprecated models get no further updates and are the first to lose capacity.

### How do I migrate from OpenAI GPT-4.1 nano to gpt-5.6-luna?

Swap the model id in your API call: replace "gpt-4.1-nano" with "gpt-5.6-luna". Fine-tuned gpt-4.1-nano deployments are directed to gpt-5.4-nano instead; a fine-tune does not transfer and has to be re-run on the new base.

### Does this apply to gpt-4.1-nano-2025-04-14 too?

Yes. OpenAI GPT-4.1 nano is also published as `gpt-4.1-nano-2025-04-14`; that id shares the same lifecycle dates as `gpt-4.1-nano`.

## 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-4.1-nano
JSON: https://modeldeprecations.dev/api/v1/models/openai/gpt-4.1-nano.json