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Google gemini-3-flash-preview

Gemini 3 Flash (preview) (Google)

Active

No — Gemini 3 Flash (preview) is not deprecated as of July 30, 2026. Google has announced neither a deprecation nor a shutdown date for it. Google points new work at Gemini 3.6 Flash.

The first Flash model of the Gemini 3 generation. Google lists a recommended replacement for it but no shutdown date, which puts it in an unusual middle state: superseded but not yet scheduled.

The facts

Provider Google
Model id gemini-3-flash-preview
Released December 17, 2025
Deprecated not deprecated
Shutdown not published
Status Active
Last verified July 30, 2026

What to use instead

Google Gemini 3.6 Flash gemini-3.6-flash Provider-recommended Active

Google names gemini-3.6-flash as the replacement even though no shutdown date has been set. Moving now avoids a rushed migration when one is.

What parameters gemini-3.6-flash accepts on modelparams.dev

Change the id

In most cases the migration is one string. Check the parameter differences before you ship — newer models drop older sampling knobs more often than they add them. 

- "model": "gemini-3-flash-preview"
+ "model": "gemini-3.6-flash"

Frequently asked questions

What replaces Google Gemini 3 Flash (preview)?
Google recommends Gemini 3.6 Flash (`gemini-3.6-flash`) as the replacement for Google Gemini 3 Flash (preview). Google names gemini-3.6-flash as the replacement even though no shutdown date has been set. Moving now avoids a rushed migration when one is.
Is Google Gemini 3 Flash (preview) still available?
Yes. Google Gemini 3 Flash (preview) is active and fully supported as of July 30, 2026.
How do I migrate from Google Gemini 3 Flash (preview) to gemini-3.6-flash?
Swap the model id in your API call: replace "gemini-3-flash-preview" with "gemini-3.6-flash". Google names gemini-3.6-flash as the replacement even though no shutdown date has been set. Moving now avoids a rushed migration when one is.

Sources

Found something wrong? The data is one YAML file — edit it on GitHub.

This page, for machines

JSON Markdown Badge JSON

Drop the badge in a README so it turns red the day this model is retired:

[![gemini-3-flash-preview](https://img.shields.io/endpoint?url=https://modeldeprecations.dev/badge/google/gemini-3-flash-preview.json)](https://modeldeprecations.dev/google/gemini-3-flash-preview)

Other Google models

All Google deprecations →

How to use this site

The full guide, in Markdown. Copy it and hand it to a coding agent verbatim.

# How to use modeldeprecations.dev

[modeldeprecations.dev](https://modeldeprecations.dev) answers one question per model: is it deprecated,
when does it shut down, and what replaces it. Every date on the site is cited to the
provider's own documentation, with the date we last checked it.

Three lifecycle states are used, matching the providers' own vocabulary:

- **active** — still supported, no deprecation announced.
- **deprecated** — the provider has announced it is going away. It still answers requests.
- **retired** — API access is gone. Requests fail.

A model can be active *and* carry a shutdown date: Anthropic publishes a
"not sooner than" date and Google publishes an earliest shutdown date for models
that are current and fully supported. Those are reported as scheduled shutdowns,
not deprecations, because that is what the provider actually committed to.

## Check one model

```bash
curl https://modeldeprecations.dev/api/v1/models/openai/gpt-4-32k.json
```

Or fetch the page as Markdown, which includes the answer, the dates and the sources:

```bash
curl https://modeldeprecations.dev/openai/gpt-4-32k.md
```

## Full catalog

```bash
curl https://modeldeprecations.dev/api/v1/models.json
```

Ids are `provider/model`. Dated snapshots (`gpt-4-32k-0613`) are listed as aliases of
their canonical entry rather than as separate records.

Each entry carries `computed_status`, the lifecycle state recomputed against the build
date — so a model whose shutdown has passed reads `retired` without anyone editing data.

## Badges

A shields.io endpoint per model, for READMEs that should go red when a model dies:

```
https://img.shields.io/endpoint?url=https://modeldeprecations.dev/badge/openai/gpt-4-32k.json
```

## Calendar and changelog

- Subscribe to every shutdown date: https://modeldeprecations.dev/calendar.ics
- Changelog RSS: https://modeldeprecations.dev/changelog.xml

## JSON Schema

```bash
curl https://modeldeprecations.dev/api/v1/schema.json
```

## Contribute

Data lives in YAML under `models/{provider}/{model}.yaml` in the
[GitHub repo](https://github.com/mnfst/modeldeprecations.dev). Every lifecycle date needs a source URL; CI rejects a
date without one. Open a PR.

## For agents

- Machine-readable overview: https://modeldeprecations.dev/llms.txt
- This guide plus every model inline: https://modeldeprecations.dev/llms-full.txt
- Any page also exists as Markdown: append `.md` to a model URL.
- In a browser, this site registers a **WebMCP** tool on `navigator.modelContext`:
  `check_model_deprecation`, `list_shutdowns`, `find_replacement`, and `get_usage_guide`.
- Parameters each model accepts are catalogued on the sibling site, https://modelparams.dev.