> ## Documentation Index
> Fetch the complete documentation index at: https://docs.yingtu.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Gemini 3.1 Flash Image on YingTu

> Use Nano Banana 2 as the general-purpose YingTu image model when you need editing plus 1K, 2K, or 4K output.

`gemini-3.1-flash-image` is the general-purpose default for new Nano Banana
integrations on YingTu. It keeps Flash-class efficiency while adding higher
resolution choices that the Lite and original models do not provide here.

Google positions Nano Banana 2 for mainstream high-quality generation and
conversational editing, with improved consistency, aspect-ratio adherence, and
international text rendering. Review the current upstream
[model page](https://ai.google.dev/gemini-api/docs/models/gemini-3.1-flash-image).

## What YingTu verified

The synchronous 2K request produced a 2048 × 2048 JPEG. A 1K asynchronous task
completed with a 1024 × 1024 JPEG, and inline editing preserved the source
subject while changing its background. All responses used the expected Gemini
native `candidates` structure.

## Compare with Nano Banana Pro

| Decision          | Flash Image                                       | Pro Image                                          |
| ----------------- | ------------------------------------------------- | -------------------------------------------------- |
| YingTu price      | USD 0.025 / USD 0.037 / USD 0.055 at 1K / 2K / 4K | USD 0.050 / USD 0.050 / USD 0.090                  |
| Resolution        | 1K, 2K, 4K                                        | 1K, 2K, 4K                                         |
| Upstream position | Mainstream speed, quality, and volume             | Reasoning-driven professional design and precision |
| Verified request  | 2K sync completed in 13.718 seconds               | 4K sync completed in 35.407 seconds                |

The timings used different resolutions and are not a speed benchmark. Start
with Flash for a new general-purpose integration; move a representative sample
to Pro when complex layouts, text-heavy graphics, or premium mockups justify
the higher price.

<CardGroup cols={2}>
  <Card title="Configure Flash" icon="sliders-horizontal" href="/en/models/image/nano-banana/gemini-3.1-flash-image/parameters">
    Choose 1K, 2K, or 4K in the correct nested field.
  </Card>

  <Card title="Compare all models" icon="columns-3" href="/en/models/image/nano-banana/comparison">
    See the full family decision guide.
  </Card>
</CardGroup>