gemini-nano-banana-2.1 — API, Pricing & Image Tokens | Vivgrid

gemini-nano-banana-2.1, also known as Nano Banana 2.1, is Google's image model for prompt-driven generation, multi-turn editing, and visual design workflows, succeeding gemini-3.1-flash-image (Nano Banana 2). It takes text, image, and video input, supports thinking, and returns images alongside text — with image output at half the per-token price of Nano Banana 2.

On Vivgrid, gemini-nano-banana-2.1 runs as a globally centralized model reachable through the same OpenAI-compatible endpoint and unified key as every other model in the catalog.

Specifications

Pricing

Pricing in USD per 1M tokens, matching the provider's rates.

Image token conversion

Images are billed as tokens, so the per-image cost follows the resolution you ask for:

Text, image, and video input are all billed at $1.50 per 1M tokens. Text and thinking tokens are billed at the text output rate of $7.50 per 1M tokens. The model does not support context caching, so there is no cached-input rate.

API surfaces

gemini-nano-banana-2.1 is served on /images/generations, behind the same API key as the rest of the catalog.

Quick start

Get an API key from the Vivgrid Console, then call gemini-nano-banana-2.1 directly.

curl https://api.vivgrid.com/v1/images/generations \
  -H "Authorization: Bearer $VIVGRID_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gemini-nano-banana-2.1",
    "prompt": "A cozy reading nook with plants and warm light",
    "size": "1024x1024"
  }'

Ideal use cases

• High-volume image generation pipelines
• Conversational, multi-turn image editing
• Product, marketing, and social-media creative from reference images or video
• Visual design workflows that need an image model at a mainstream price point

Related models

• gemini-3.1-flash-image — the prior Nano Banana 2 release
• gemini-3-pro-image — Nano Banana Pro, Google's highest-quality image generation and editing
• gpt-image-2.5-flare — OpenAI's gpt-image-2.5 image generation model