Nano Banana 2

# Nano Banana 2 — Pro Pack on RunComfy

[runcomfy.com](https://www.runcomfy.com/?utm_source=skills.sh&utm_medium=skill&utm_campaign=nano-banana-2) · [Model page](https://www.runcomfy.com/models/google/nano-banana-2?utm_source=skills.sh&utm_medium=skill&utm_campaign=nano-banana-2) · [GitHub](https://github.com/agentspace-so/runcomfy-skills/tree/main/nano-banana-2)

Google **Nano Banana 2** — the flash-tier text-to-image model in the Gemini family — hosted on the **RunComfy Model API**. Optimized for ideation, social-thumbnail batches, and rapid drafts with strong in-image typography.

```bash npx skills add agentspace-so/runcomfy-skills --skill nano-banana-2 -g ```

## When to pick this model (vs siblings)

Nano Banana 2 is the **flash-tier** of the Google image-gen line. Pick it when iteration speed and predictable framing matter more than maximum detail.

| You want | Use | |---|---| | Rapid drafts, social thumbnails, batch variants | **Nano Banana 2** | | In-image typography with predictable rendering | **Nano Banana 2** | | Web-grounded image (current events / real entities) | **Nano Banana 2** + `enable_web_search` | | Image **edit** (preserve subject, swap background) | **Nano Banana Edit** (sibling skill) | | Heavy stylization, painterly look | Flux 2 | | Maximum prompt adherence + multilingual text | GPT Image 2 | | 2K–4K hero shots, max realism | Seedream 5 | | Hyperrealistic portrait | Nano Banana Pro |

If the user said "Nano Banana" / "nano-banana-2" / "Gemini image" explicitly, route here regardless. If they said "Nano Banana" without specifying 2 vs Pro, default to **Pro** for portraits and **2** for everything else.

## Prerequisites

1. **RunComfy CLI** — `npm i -g @runcomfy/cli` 2. **RunComfy account** — `runcomfy login` opens a browser device-code flow. 3. **CI / containers** — set `RUNCOMFY_TOKEN=<token>` instead of `runcomfy login`.

## Endpoints + input schema

### `google/nano-banana-2/text-to-image`

| Field | Type | Required | Default | Notes | |---|---|---|---|---| | `prompt` | string | yes | — | Subject-first description. | | `num_images` | int | no | 1 | 1–4. Use 4 for ideation rounds. | | `seed` | int | no | 0 | Reuse for reproducibility. | | `aspect_ratio` | enum | no | `auto` | `auto`, `21:9`, `16:9`, `3:2`, `4:3`, `5:4`, `1:1`, `4:5`, `3:4`, `2:3`, `9:16`. | | `resolution` | enum | no | `1K` | `0.5K` (drafts), `1K` (default), `2K` (final), `4K` (max). | | `output_format` | enum | no | `png` | `png`, `jpeg`, `webp`. | | `safety_tolerance` | int | no | 4 | 1 (strict) – 6 (permissive). | | `limit_generations` | bool | no | true | Limit each prompt round to one generation. | | `enable_web_search` | bool | no | false | Adds web grounding (extra cost + latency). |

For image edit (preserve subject + apply changes), see the sibling [`nano-banana-edit`](../nano-banana-edit) skill.

## How to invoke

**Default draft (1K, square, png):**

```bash runcomfy run google/nano-banana-2/text-to-image \ --input '{"prompt": "<user prompt>"}' \ --output-dir <absolute/path> ```

**Vertical 4-up batch for ideation:**

```bash runcomfy run google/nano-banana-2/text-to-image \ --input '{ "prompt": "<user prompt>", "num_images": 4, "aspect_ratio": "9:16", "resolution": "0.5K" }' \ --output-dir <absolute/path> ```

**Final at 2K with seed lock:**

```bash runcomfy run google/nano-banana-2/text-to-image \ --input '{ "prompt": "<user prompt>", "resolution": "2K", "aspect_ratio": "16:9", "seed": 42 }' \ --output-dir <absolute/path> ```

**Web-grounded (current event / real entity):**

```bash runcomfy run google/nano-banana-2/text-to-image \ --input '{ "prompt": "<prompt referencing a real-world event from this week>", "enable_web_search": true }' \ --output-dir <absolute/path> ```

## Prompting — what actually works

**Subject-first declarative grammar.** "A cinematic close-up portrait of an American woman standing under neon lights in rainy Tokyo, shallow depth of field, reflective wet streets, ultra-detailed, realistic skin texture" — primary subject, then action, environment, style, camera. Front-load subject; trail with directives.

**Exact text quoting for in-image typography.** "The label reads 'AURA' in clean bold sans-serif, centered, white on black" — quote the literal characters. Specify placement and font style. Don't say "with the brand name on it" and hope.

**Consistent seeds for refinement.** Lock `seed` when iterating a single prompt across small variants — keeps composition stable.

**Web-grounding, sparingly.** Turn on `enable_web_search` only when the prompt names current events / real entities. Adds latency + cost; off by default.

**Don't conflict styles.** "minimalist + ornate + retro + cyberpunk" cancels. Pick 1–2 anchors.

**Anti-patterns:** - Trying to verbally describe a stable subject identity — use the **edit** endpoint with image refs instead. - Asking for resolutions outside the 4 tiers → 422. - Aspect ratios outs