Google: Nano Banana Pro (Gemini 3 Pro Image Preview)

google/gemini-3-pro-image-preview

Nano Banana Pro is Google’s most advanced image-generation and editing model, built on Gemini 3 Pro. It extends the original Nano Banana with significantly improved multimodal reasoning, real-world grounding, and...

Modalities

In / out price

$2 / $12 per 1M

Context

66K

Released

Nov 20, 2025

Why use Nano Banana Pro (Gemini 3 Pro Image Preview)

Understands images
Generates images
Step-by-step reasoning mode
Structured (JSON) outputs

Pricing

Input	$2 / 1M tokens
Output	$12 / 1M tokens
Cached input (read)	$0.2 / 1M tokens
Cache write	$0.38 / 1M tokens
Image input	$2 / 1M tokens

List prices via OpenRouter, checked daily. Real cost depends on the provider and on reasoning tokens.

Cost calculator

Pick a task, set how often you run it, and compare what it costs on each model.

TaskInput tokens≈ 602 wordsOutput tokens≈ 1,504 wordsRuns per month

Input served from cache: 0%Repeated prompts (same instructions or document) are billed at the cheaper cache-read price where the model supports it.

Model	Per run	Per month	Per 1,000 runs
Google: Nano Banana Pro (Gemini 3 Pro Image Preview)	$0.026	$25.60	$25.60

Estimates from list prices via OpenRouter; real bills vary by provider and reasoning tokens.

Will it fit? Context window simulator

Each square is about one page (500 words). Colored squares are your content; grey squares are free space in the model's context window.

Your content

Novel (90,000 words)

Total: about 120,000 tokens (≈ 90,226 words). Token counts are estimates.

Models

Zoom (square size): 6pxZoom out to see a whole million-token window at once.