# Google Gemini 3.1 Flash-Lite (preview) — deprecation status

> Yes — Gemini 3.1 Flash-Lite (preview) is retired. Google shut it down on May 25, 2026; API requests to it now fail. The recommended replacement is Gemini 3.1 Flash-Lite.

The preview that became gemini-3.1-flash-lite. It ran for under three months before being shut down in favour of the stable id — the standard Gemini pattern, and the reason preview ids should never reach production config.

## Facts

| Field | Value |
| --- | --- |
| Provider | Google |
| Model id | `gemini-3.1-flash-lite-preview` |
| Status | Retired |
| Released | March 3, 2026 |
| Shutdown | May 25, 2026 (66 days ago) |
| Last verified | July 30, 2026 |

## Replacement

- **Gemini 3.1 Flash-Lite** (`gemini-3.1-flash-lite`) · recommended — https://modeldeprecations.dev/google/gemini-3.1-flash-lite
  - Dropping the "-preview" suffix is the entire migration. Behaviour is unchanged.
  - Parameters it accepts: https://modelparams.dev/models/google/gemini-3.1-flash-lite

```diff
- "model": "gemini-3.1-flash-lite-preview"
+ "model": "gemini-3.1-flash-lite"
```

## FAQ

### When did Google Gemini 3.1 Flash-Lite (preview) shut down?

Google Gemini 3.1 Flash-Lite (preview) shut down on May 25, 2026. API requests to it fail from that date onward.

### What replaces Google Gemini 3.1 Flash-Lite (preview)?

Google recommends Gemini 3.1 Flash-Lite (`gemini-3.1-flash-lite`) as the replacement for Google Gemini 3.1 Flash-Lite (preview). Dropping the "-preview" suffix is the entire migration. Behaviour is unchanged.

### Is Google Gemini 3.1 Flash-Lite (preview) still available?

No. Google Gemini 3.1 Flash-Lite (preview) is retired and no longer served — it was shut down on May 25, 2026. Calls to it return an error.

### How do I migrate from Google Gemini 3.1 Flash-Lite (preview) to gemini-3.1-flash-lite?

Swap the model id in your API call: replace "gemini-3.1-flash-lite-preview" with "gemini-3.1-flash-lite". Dropping the "-preview" suffix is the entire migration. Behaviour is unchanged.

## Sources

- [Gemini API deprecations](https://ai.google.dev/gemini-api/docs/deprecations) — accessed 2026-07-30

---

Canonical page: https://modeldeprecations.dev/google/gemini-3.1-flash-lite-preview
JSON: https://modeldeprecations.dev/api/v1/models/google/gemini-3.1-flash-lite-preview.json