Access and Use Google: Nano Banana Pro (Gemini 3 Pro Image Preview) via OpenRouter using API Key
Ann Ng
Access and Use gemini-3-pro-image-preview via OpenRouter
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 high-fidelity visual synthesis. The model generates context-rich graphics, from infographics and diagrams to cinematic composites, and can incorporate real-time information via Search grounding.
It offers industry-leading text rendering in images (including long passages and multilingual layouts), consistent multi-image blending, and accurate identity preservation across up to five subjects. Nano Banana Pro adds fine-grained creative controls such as localized edits, lighting and focus adjustments, camera transformations, and support for 2K/4K outputs and flexible aspect ratios. It is designed for professional-grade design, product visualization, storyboarding, and complex multi-element compositions while remaining efficient for general image creation workflows.
Google: Nano Banana Pro (Gemini 3 Pro Image Preview) Overview
| Full Name | Google: Nano Banana Pro (Gemini 3 Pro Image Preview) |
| Provider | |
| Model ID | google/gemini-3-pro-image-preview |
| Release Date | Nov 20, 2025 |
| Context Window | 65,536 tokens |
| Pricing /1M tokens | $0.002 for input $0.012 for output $67 for image |
| Supported Input Types | image, text |
| Supported Parameters | include_reasoningmax_tokensreasoningresponse_formatseedstopstructured_outputstemperaturetop_p |
Complete Setup Guide
Create OpenRouter Account
- Visit openrouter.ai
- Click "Sign In" and create an account (free)
- Verify your email address
- You'll receive $1 in free credits to test models
Get Your OpenRouter API Key
- Log in to OpenRouter dashboard
- Go to "API Keys" section in the menu
- Click "Create API Key"
- Give it a name (e.g., "TypingMind")
- Copy your API key (starts with "sk-or-v1-...")
Add Credits to OpenRouter (Optional)
- Go to "Credits" in OpenRouter dashboard
- Click "Add Credits"
- Choose amount ($5 minimum, $20 recommended for testing)
- Complete payment (credit card or crypto)
- Credits never expire!
Configure TypingMind with OpenRouter API Key
Method 1: Direct Import (Recommended)
- Open TypingMind in your browser
- Click the "Settings" icon (gear symbol)
- Navigate to "Manage Models" section
- Click "Add Custom Model"
- Select "Import OpenRouter" from the options
- Enter your OpenRouter API key from Step 1
- Click "Check API Key" to verify the connection
- Choose which models you want to add from the list (you can add multiple at once)
- Click "Import Models" to complete the setup
Method 2: Manual Custom Model Setup
- Open TypingMind in your browser
- Click the "Settings" icon (gear symbol)
- Navigate to "Models" section
- Click "Add Custom Model"
- Fill in the model information:Name:
google/gemini-3-pro-image-preview via OpenRouter(or your preferred name)Endpoint:https://openrouter.ai/api/v1/chat/completionsModel ID:google/gemini-3-pro-image-previewContext Length: Enter the model's context window (e.g., 65536 for google/gemini-3-pro-image-preview)
google/gemini-3-pro-image-previewhttps://openrouter.ai/api/v1/chat/completionsgoogle/gemini-3-pro-image-preview via OpenRouterhttps://www.typingmind.com/model-logo.webp65536 - Add custom headers by clicking "Add Custom Headers" in the Advanced Settings section:Authorization:
Bearer <OPENROUTER_API_KEY>:X-Title:typingmind.comHTTP-Referer:https://www.typingmind.com - Enable "Support Plugins (via OpenAI Functions)" if the model supports the "functions" or "tool_calls" parameter, or enable "Support OpenAI Vision" if the model supports vision.
- Click "Test" to verify the configuration
- If you see "Nice, the endpoint is working!", click "Add Model"
Start chatting with google/gemini-3-pro-image-preview
Now you can start chatting with the google/gemini-3-pro-image-preview model via OpenRouter on TypingMind:
- Select your preferred google/gemini-3-pro-image-preview model from the model dropdown menu
- Start typing your message in the chat input
- Enjoy faster responses and better features than the official interface
- Switch between different AI models as needed
google/gemini-3-pro-image-previewPro tips for better results:
- Use specific, detailed prompts for better responses (How to use Prompt Library)
- Create AI agents with custom instructions for repeated tasks (How to create AI Agents)
- Use plugins to extend google/gemini-3-pro-image-preview capabilities (How to use plugins)
- Upload documents and images directly to chat for AI analysis and discussion (Chat with documents)
Why TypingMind + OpenRouter?
- Best-in-class UI: TypingMind's interface is far superior to standard chat UIs
- Model flexibility: Switch between Google: Nano Banana Pro (Gemini 3 Pro Image Preview) and 200+ models instantly
- Cost control: Pay only for what you use through OpenRouter
- One-time purchase: Buy TypingMind once, use forever with any OpenRouter model
- Data privacy: Your conversations stored locally, not on external servers
Frequently Asked Questions
Do I need a subscription to use Google: Nano Banana Pro (Gemini 3 Pro Image Preview)?
No! Through OpenRouter, you pay only for what you use with no monthly subscription. Add credits to your OpenRouter account and they never expire. TypingMind is also a one-time purchase, not a subscription.
How much will it cost to use Google: Nano Banana Pro (Gemini 3 Pro Image Preview)?
It costs 0.002 for input and 0.012 for output via OpenRouter. A typical conversation might cost $0.01-0.10 depending on length. Start with $5-10 in credits to test.
Can I use other models besides Google: Nano Banana Pro (Gemini 3 Pro Image Preview)?
Yes! With OpenRouter + TypingMind, you get access to 200+ models including GPT-4, Claude, Gemini, Llama, Mistral, and many more. Switch between them instantly in TypingMind.
Is my data private and secure?
Yes! TypingMind stores conversations locally (web version in browser, desktop version on your device). OpenRouter handles API calls securely and doesn't train on your data. Check each provider's data policy for specifics.
Can I use Google: Nano Banana Pro (Gemini 3 Pro Image Preview) for commercial projects?
Yes! Check Google's terms of service for specific commercial use policies. OpenRouter and TypingMind both support commercial use.
What if Google: Nano Banana Pro (Gemini 3 Pro Image Preview) is unavailable?
OpenRouter allows you to configure fallback models. If Google: Nano Banana Pro (Gemini 3 Pro Image Preview) is down, it can automatically route to your backup choice. You can also manually switch models in TypingMind anytime.
How do I cancel or get a refund?
OpenRouter: No subscriptions to cancel. Unused credits remain in your account forever.
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