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

# Nano Banana Lite Image Gen/Editing

> Google's fastest, most efficient image model Nano Banana 2 Lite (gemini-3.1-flash-lite-image) - ~4s per image, ~2.7x faster than Nano Banana 2, focused on the 1K canvas + 14 aspect ratios. APIYI token-based averages ~$0.018/call in practice (40% of Google's rate), per-call $0.025.

## Overview

**Nano Banana 2 Lite** (shortened to **Nano Banana Lite** in this section) is a Google image model released on June 30, 2026, with model ID `gemini-3.1-flash-lite-image`. It is the **lightweight, economical version** of Nano Banana 2 (`gemini-3.1-flash-image`), focused on **speed and cost**: \~4s per image, \~**2.7x faster** than Nano Banana 2, making it the **fastest and cheapest** tier of the Nano Banana series.

<Note>
  **🍌 Released June 30, 2026**: Nano Banana 2 Lite is live! \~4s per image, \~2.7x faster than Nano Banana 2, focused on the 1K canvas + 14 aspect ratios, with a built-in SynthID invisible watermark. APIYI brought it online immediately — token-based **averages \~\$0.018/call in practice** (40% of Google's rate), per-call \$0.025 — built for high concurrency, low cost, and rapid iteration.
</Note>

<Warning>
  **Provisional pricing**: The model just launched and the current price is provisional; the final price may be adjusted later. We'll announce any change — please refer to the live price on the platform.
</Warning>

<CardGroup cols={2}>
  <Card title="Text-to-Image API" icon="wand-sparkles" href="/en/api-capabilities/nano-banana-lite-image/text-to-image">
    Generate images from text prompts. Includes an interactive playground for online testing.
  </Card>

  <Card title="Image Editing API" icon="image" href="/en/api-capabilities/nano-banana-lite-image/image-edit">
    Upload an image + edit instructions to generate new images. Includes an interactive playground.
  </Card>
</CardGroup>

## Why APIYI's Nano Banana Lite?

**Nano Banana Pro / 2 is the #1 model by usage volume on APIYI** — stable, reliable, and fast. The Lite tier pushes "fast" and "cheap" to a new level, ideal for high-throughput scenarios. APIYI deeply optimizes the experience across **reliability**, **cost**, and **integration**:

<CardGroup cols={2}>
  <Card title="Official Channel · Same as Gemini" icon="shield-check">
    100% compatible with Google's native Gemini API (`/v1beta/models/.../generateContent`) and the OpenAI SDK pattern — same request body, response fields, and error codes. Zero-code migration.
  </Card>

  <Card title="No Concurrency Limits" icon="infinity">
    Not bound by Google AI Studio's RPM/RPD ceilings. Enterprise-scale batch generation and peak traffic scale linearly without quota interruptions.
  </Card>

  <Card title="Token-based ~\$0.018/call" icon="percent">
    **Token-based averages \~\$0.018/call in practice** (40% of Google's rate: input \$0.10 / output \$12 per 1M tokens), cheaper than per-call \$0.025/image (vs Google \~\$0.034). Stack with [top-up bonuses](/en/faq/recharge-promotions) for even lower cost.
  </Card>

  <Card title="Global Zero-Barrier Access" icon="globe">
    **No overseas server or proxy required** — connect directly to `api.apiyi.com` from mainland data centers, residential networks, or overseas nodes. Stable latency, no cross-border re-architecture.
  </Card>

  <Card title="Full Model Lineup" icon="layers">
    Same series covers [Nano Banana Pro](/en/api-capabilities/nano-banana-image/overview) (ultimate quality), [Nano Banana 2](/en/api-capabilities/nano-banana-2-image/overview) (quality + speed), and Nano Banana 2 Lite (fastest, cheapest) — mix and match per scenario.
  </Card>

  <Card title="Professional Enterprise Support" icon="handshake">
    Our team specializes in production image-generation deployments, with deep experience in model selection, tuning, and integration — end-to-end support from PoC to production.
  </Card>
</CardGroup>

## Core Features

<CardGroup cols={2}>
  <Card title="~4s per Image" icon="gauge-max">
    \~4s per image, \~2.7x faster than Nano Banana 2 — built for high concurrency and rapid iteration
  </Card>

  <Card title="Low Cost" icon="hand-holding-dollar">
    Token-based averages \~\$0.018/call in practice (40% of Google's rate), cheaper than per-call \$0.025 — ideal for cost-sensitive per-image workloads
  </Card>

  <Card title="14 Aspect Ratios" icon="maximize">
    Covers 14 ratios including `1:1`, `4:1`, `1:4`, `16:9`, `9:16` — fits many layouts
  </Card>

  <Card title="SynthID Watermark" icon="shield-check">
    Output carries a SynthID invisible digital watermark — invisible to the naked eye, doesn't affect usage
  </Card>
</CardGroup>

## Version Comparison

| Feature        | **Nano Banana 2 Lite**        | Nano Banana 2            | Nano Banana Pro      |
| -------------- | ----------------------------- | ------------------------ | -------------------- |
| Model ID       | `gemini-3.1-flash-lite-image` | `gemini-3.1-flash-image` | `gemini-3-pro-image` |
| Positioning    | Fastest / cheapest            | Quality + speed          | Ultimate quality     |
| Quality        | ⭐⭐⭐⭐ Excellent                | ⭐⭐⭐⭐⭐ Pro-level          | ⭐⭐⭐⭐⭐ Highest        |
| Speed          | 🚀 \~4s                       | ⚡ Fast                   | 🐢 Slower            |
| Max Resolution | 1K                            | 4K                       | 4K                   |
| Aspect Ratios  | 14                            | 14                       | 10                   |
| APIYI Pricing  | **\$0.025/image**             | \$0.055/image            | \$0.09/image         |

<Tip>
  **Selection Guide**:

  * ⚡ **Best value / fast batch generation** → Nano Banana 2 Lite (\~4s per image, \$0.025 per-call)
  * 🔥 **Need 2K/4K HD or stronger quality** → Nano Banana 2 (Pro-level quality + Flash-tier speed)
  * 🎨 **Ultimate quality** → Nano Banana Pro (highest fidelity)
</Tip>

## Pricing

<Info>
  **Billing Mode Selection**: Nano Banana 2 Lite supports two billing modes, selected via the "Billing model" setting when creating your API token:

  * Select **Pay-as-you-go** or **Pay-as-you-go Priority** → Token-based billing
  * Select **Pay-per-request** or **Pay-per-request Priority** → Per-call billing
  * ⚠️ **Do NOT select Hybrid billing**
</Info>

### Token-based Billing (Recommended · 40% of Google's Rate)

| Billing Item | Google Official  | APIYI                | Discount |
| ------------ | ---------------- | -------------------- | -------- |
| Input        | \$0.25/M tokens  | **\$0.10/M tokens**  | **40%**  |
| Output       | \$30.00/M tokens | **\$12.00/M tokens** | **40%**  |

<Info>
  **Predictable real-world unit price**: under token-based (per-token) billing, a 1K image **averages \~\$0.018/call in practice** (typical range \~\$0.016–\$0.019, driven by output tokens). That's cheaper than the flat per-call \$0.025/image, with a stable, predictable unit price.
</Info>

### Per-call Billing

| Model                                                | APIYI Pricing     | Google Official | Note                                                  |
| ---------------------------------------------------- | ----------------- | --------------- | ----------------------------------------------------- |
| **Nano Banana 2 Lite** `gemini-3.1-flash-lite-image` | **\$0.025/image** | \~\$0.034/image | Flat rate; may be lowered later but unchanged for now |

<Tip>
  **💰 Which billing mode? Prefer `Pay-as-you-go Priority`.** Token-based (per-token) billing runs \~\$0.018/call in practice — cheaper than per-call \$0.025 with a predictable unit price; and with the token's billing model set to `Pay-as-you-go Priority`, **one token also covers Nano Banana Pro / 2's per-call billing** — run the whole series with one token. The per-call \$0.025/image is a flat rate that **may be lowered later but is unchanged for now** — refer to the live price on the platform. Combined with top-up bonuses, actual costs are even lower.
</Tip>

<Warning>
  The model just launched and the current price is provisional; the final price may be adjusted later (the per-call \$0.025/image may be lowered later). We'll announce any change — please refer to the live price on the platform.
</Warning>

## Group Setup

Nano Banana 2 Lite works on APIYI's default channel — no dedicated group required:

| Group     | Rate | When to use                                             |
| --------- | ---- | ------------------------------------------------------- |
| `Default` | 1.0x | Base lane, matches the price table; recommended default |

**Recommended Billing model: pick `Pay-as-you-go Priority` by default.** Three reasons: ① token-based (per-token) billing runs \~\$0.018/call in practice, cheaper than per-call \$0.025; ② the unit price is stable and predictable; ③ one token **covers Lite / Nano Banana 2 token-based billing AND Nano Banana Pro per-call billing** — run the whole series with one token.

## Supported Resolutions & Aspect Ratios

### Output Resolutions

| Resolution | Description              | Recommended Use                                        |
| ---------- | ------------------------ | ------------------------------------------------------ |
| 1K         | The only tier (no 2K/4K) | Social images, thumbnails, draft previews, web display |

<Info>
  Nano Banana 2 Lite is focused on the **1K canvas** and does not support 2K/4K. For higher resolution or stronger quality, switch to [Nano Banana 2](/en/api-capabilities/nano-banana-2-image/overview) (up to 4K) or [Nano Banana Pro](/en/api-capabilities/nano-banana-image/overview).
</Info>

### Supported Aspect Ratios (14 total)

`1:1`, `1:4`, `4:1`, `1:8`, `8:1`, `2:3`, `3:2`, `3:4`, `4:3`, `4:5`, `5:4`, `9:16`, `16:9`, `21:9`

### Output Dimensions per Aspect Ratio (1K, pixels)

In your request, set `aspectRatio` for the ratio and keep `imageSize` at `1K`:

| Aspect Ratio | 1K Output |
| ------------ | --------- |
| **1:1**      | 1024×1024 |
| **1:4**      | 512×2048  |
| **1:8**      | 384×3072  |
| **2:3**      | 848×1264  |
| **3:2**      | 1264×848  |
| **3:4**      | 896×1200  |
| **4:1**      | 2048×512  |
| **4:3**      | 1200×896  |
| **4:5**      | 928×1152  |
| **5:4**      | 1152×928  |
| **8:1**      | 3072×384  |
| **9:16**     | 768×1376  |
| **16:9**     | 1376×768  |
| **21:9**     | 1584×672  |

## FAQ

<AccordionGroup>
  <Accordion title="What's the difference between Nano Banana 2 Lite and Nano Banana 2?">
    Both are based on Google's Gemini 3.1 Flash series; **Lite** is the **lightweight, economical version**:

    * ✅ **Speed**: Lite generates in \~4s, \~2.7x faster than Nano Banana 2
    * ✅ **Price**: Lite token-based averages \~\$0.018/call in practice (40% of Google's rate), per-call \$0.025 — better for volume
    * ⚠️ **Resolution**: Lite supports 1K only; Nano Banana 2 goes up to 4K
    * ⚠️ **Quality ceiling**: for ultimate quality, Nano Banana 2 / Pro are better

    Migrating from Nano Banana 2 just needs a model-name change (note Lite is 1K only): swap `gemini-3.1-flash-image` for `gemini-3.1-flash-lite-image`.
  </Accordion>

  <Accordion title="Should I choose Lite or Nano Banana 2?">
    * **Best value / fast batch generation / 1K is enough** → choose **Lite** (\~4s, \$0.025 per-call)
    * **Need 2K/4K HD, or higher quality** → choose **Nano Banana 2** (up to 4K, Pro-level quality)

    The code is identical between the two — only the model name differs, so you can switch and test anytime.
  </Accordion>

  <Accordion title="How long does it take to generate an image?">
    Nano Banana 2 Lite is built for speed — **\~4s at 1K resolution**. Still, set a longer client timeout (e.g. 300 seconds) to handle occasional delays and peak congestion.
  </Accordion>

  <Accordion title="Is there a concurrency limit?">
    **The API has no concurrency limit and does not process serially.** You can safely fire concurrent requests yourself — requests don't queue or block each other. Unlike Google AI Studio, the APIYI channel has no hard RPM/RPD limits, so enterprise batch generation and peak traffic scale linearly.

    What actually matters is the `timeout` — though Lite is fast, a single request can still slow down during peak congestion, so set your client timeout to 300 seconds.
  </Accordion>

  <Accordion title="What input image formats are supported?">
    For image editing, `image/png` and `image/jpeg` are supported via base64 encoding. See the [Image Editing API Reference](/en/api-capabilities/nano-banana-lite-image/image-edit).
  </Accordion>

  <Accordion title="Do output images have watermarks?">
    All output images carry SynthID invisible digital watermarks (Google's AI-generated content identification technology) — invisible to the naked eye and doesn't affect usage.
  </Accordion>
</AccordionGroup>

## Related Documentation

* [Nano Banana 2 Image Generation](/en/api-capabilities/nano-banana-2-image/overview) - Quality + speed tier, up to 4K
* [Nano Banana Pro Image Generation](/en/api-capabilities/nano-banana-image/overview) - Ultimate-quality flagship
* [Image Generation Comparison Testing](https://imagen.apiyi.com/)
* [API Usage Manual](/en/api-manual)

<Info>
  Nano Banana 2 Lite just launched. Features and pricing may be adjusted. Please follow documentation updates for the latest information.
</Info>