Gemini 3 Pro Image, also branded Nano Banana Pro, is Google's GA reasoning-driven image generation and editing model for professional visual work. Google positions it as the strongest Gemini image model for complex and multi-turn generation, image editing, interleaved text-and-image outputs, and prompts that need the model to reason about layout before rendering.
Operationally, it is a text-and-image in/out model with a 65,536-token context window, 32,768 maximum output tokens, up to 14 input images per prompt, 1K/2K output plus 4K preview output, C2PA content credentials, Google Search grounding, batch inference, and Provisioned Throughput support. The model does not support audio, video, Gemini Live API, function calling, structured output, tuning, or OpenAI chat completions on Google's native surface.
Through TheRouter, Gemini 3 Pro Image should be treated as a premium async image model: call the OpenAI-compatible Images API path with model: "google/gemini-3-pro-image", submit with ?async=true, then poll the returned job. Google prices the standard endpoint at $2/M input tokens, $12/M text output tokens, and $120/M image output tokens; 1K and 2K images consume 1,120 image output tokens, while 4K consumes 2,000.