🍌 智绘香蕉2 (极速版)

ZH_BananaTutuPort (🍌 智绘香蕉2 极速版) is an API-wrapper node for Google's Nano Banana 2 - the closed Gemini image model - plus a Gemini 3 Pro preview option, and it gets you there by routing through a third-party endpoint. If the phrase "closed-source model" makes you reach for the wallet, that's the whole pitch: you can't download Nano Banana 2, so you call it. This node is the call, packaged so the returned image drops into your ComfyUI graph exactly like a local generator would. The name "TutuPort" is a port of a "Tutu"-style banana API wrapper; the "(极速版)" is about the session reuse under the hood.

What it actually is

Read this closely before you wire it up: the node does not run anything locally. It's a JSON HTTP client with your API key baked in. It POSTs your prompt, aspect ratio, size and seed to base_url - default https://ai.t8star.cn/v1/images/generations, a reseller/proxy endpoint, not Google's first-party API - and decodes the base64 image that comes back. t8star.cn is the kind of reseller the KB's API-nodes doc describes: cheaper than first-party, sometimes the only route in certain regions, and completely outside Google's billing and moderation pipe. Your key, your call, their endpoint.

It supports image editing too: optional image_1 through image_4 IMAGE sockets get base64-encoded and sent along as references, which is how you do nano-banana-style subject editing or multi-image conditioning without leaving the graph.

The inputs that matter

• api_key - the only thing that makes it run. The placeholder says sk-xxx..., and the node literally refuses with an error image if it's empty. Get it from whoever runs your endpoint.
• model - nano-banana-2 (default) or gemini-3-pro-image-preview.
• prompt - what you want, as English as you'd write to Gemini.
• aspect_ratio (ten choices, 1:1 default), image_size (1K/2K/4K, 2K default), seed (0 = random), and image_quality (JPEG compression, 60–100, default 85 - this one affects file size and compression artifacts, not model output quality).

Outputs are three: 生成图片 (IMAGE) to feed your save or upscale, 详细信息 (STRING) with the raw response detail, and 智绘显示 (STRING) - a pretty-printed status panel the pack renders for you. This is an output node, so it's built to be the end of a branch.

Install

Part of the 智绘灵箱 (ComfyUI-ZhiHui) pack:

cd ComfyUI/custom_nodes
git clone https://github.com/zhuyungen/ComfyUI-ZhiHui.git

Restart ComfyUI (or ComfyUI Manager, "智绘灵箱" / "ComfyUI-ZhiHui"). Only requests is needed beyond the basics.

Where people get burned

• No key, no picture - and it's silent-ish about it. Missing key produces an error image and console message, so check the console if you get a red 512×512 square.
• base_url is a live dependency. The default points at a third-party reseller whose endpoint can change, rate-limit, or vanish. If generation starts failing, the first thing to check is whether your endpoint is still up, not your prompt.
• This is the security-shaped node. The KB's API-nodes doc puts it bluntly: a node whose whole job is to phone home with your API key is exactly the shape of past credential-stealing malware. That doesn't make this one malicious - but use a key scoped to one provider, and don't paste a high-value key into a shared workflow file.
• Image quality ≠ resolution. Crank image_quality to 100 and you've just inflated file size, not model detail. 85 is fine.

If you want Nano Banana 2 inside ComfyUI and you're already in this pack, this is the fastest door - but the KB's honest take applies: the official ComfyUI Partner Nodes route the same model through Comfy's own metered storefront, and which is safer is your call. This one is a key, an endpoint, and a prompt away from working.