Model detail
Nano Banana Pro (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 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.
Model specs
- Model ID
-
gemini-3-pro-image-preview
- Context length
- –
- Max output
- –
- I/O modalities
- Released
- 2025-11
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API endpoints
One MixRoute gateway, OpenAI-compatible
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Gemini
/v1beta/models/{model}:generateContentPOST -
OpenAI-compatible
/v1/chat/completionsPOST
03
Pricing
Flat rate, unit: /1M Tokens
Input
$2.0000 /1M Tokens
Completion
$12.0000 /1M Tokens
Image input
$2.0000 /1M Tokens
Image completion
$20.0000 /1M Tokens
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Selection summary
Quickly judge whether it fits your workload
What is this model good for?
Nano Banana Pro is Google’s most advanced image-generation and editing model
Nano Banana Pro is Google’s most advanced image-generation and editing model, built on Gemini 3 Pro.
What should you check before using it?
Confirm output sizes and supported image formats
Model type: image. Verify supported features and quotas with the provider documentation. Knowledge cutoff: 2025-01. Released 2025-11-20.
Why use it through MixRoute?
Nano Banana Pro (Gemini 3 Pro Image Preview) takes text and images on one route
Text and image inputs share the same route and the same key. MixRoute serves Nano Banana Pro (Gemini 3 Pro Image Preview) on the OpenAI-compatible endpoint /v1/chat/completions; point your existing client at https://api.mixroute.ai/v1 with the model ID gemini-3-pro-image-preview and re-run your integration tests.
07
Capabilities & compatibility
Unconfirmed capabilities stay "Unknown," no guesses
Structured output
Nano Banana Pro (Gemini 3 Pro Image Preview) can produce JSON-formatted output on demand.
response_format: { type: "json_schema" } forces valid JSON output.
Streaming
Nano Banana Pro (Gemini 3 Pro Image Preview) supports streamed responses.
stream: true streams tokens incrementally, so chat UIs render as they arrive.
Prompt caching
Nano Banana Pro (Gemini 3 Pro Image Preview) supports prompt caching under supported routing conditions.
Vision input
Nano Banana Pro (Gemini 3 Pro Image Preview) can process image inputs alongside text.
image_url content part alongside text messages.
OpenAI SDK
Call Nano Banana Pro (Gemini 3 Pro Image Preview) through MixRoute's OpenAI-compatible endpoint.
base_url to https://api.mixroute.ai/v1; everything else follows the OpenAI style.
08
Token cost estimator
Live estimate from this page's pricing, not an actual bill
This model has no cache-read price; caching is not counted
09
FAQ
Yes. Nano Banana Pro (Gemini 3 Pro Image Preview) is reachable through an OpenAI-compatible endpoint, so an existing OpenAI SDK client works after pointing the base URL at MixRoute and setting the model parameter to gemini-3-pro-image-preview. Keep your current request and response handling.
One endpoint, a testable decision
Test this model and alternate routes with the same request format
Start from a real workload, then let quality, total cost, and failure conditions decide whether to send production traffic.