Nano Banana Pro by Google — premium image generation with sharp detail and natural lighting. Up to 4K resolution, optional web search. SynthID watermarking on every output.
Two variants for different quality and cost needs — all on the same Runflow API.
Premium — highest quality, web search, up to 4K
Standard — fast generation from 0.5K to 4K
Every model on Runflow is scored per vertical — not generic leaderboard numbers. Scores come from domain-expert evaluation on real production prompts.
| Use Case | Assessment | Notes |
|---|---|---|
| Portrait | Strong | Premium quality with sharp detail and natural lighting |
| Fashion | Strong | High-end editorial quality with fine textures |
| Product | Strong | Clean output with SynthID watermarking |
| Creative | Strong | Web search mode enhances creative reference accuracy |
| Quality | Price per image | Multiplier |
|---|---|---|
| Standard (up to 2K) | $0.150 | 1× |
| 4K | $0.300 | 2× |
$1.00 runs this model ~7 times at standard rate. Pricing may change in the future.
Full parameter reference for the nano-banana-pro model endpoint.
| Parameter | Type | Description |
|---|---|---|
| prompt | string | Text prompt describing the image to generate. 3–50,000 characters. |
| resolution | string | Output resolution. Options: "1K", "2K", "4K". Default: "1K". Affects price. |
| aspect_ratio | string | Image aspect ratio. Options: "21:9", "16:9", "3:2", "4:3", "5:4", "1:1", "4:5", "3:4", "2:3", "9:16". Default: "1:1". |
| enable_web_search | boolean | Enable web search to ground generation in current information. +$0.015/image. Default: false. |
| num_images | integer | Number of images to generate. Range: 1–4. Default: 1. |
| output_format | string | Output format. Options: "jpeg", "png", "webp". Default: "png". |
| safety_tolerance | string | Content moderation level. 1 = most strict, 6 = least strict. Default: 4. |
| seed | integer | Random seed for reproducible outputs. |
| limit_generations | boolean | Limit to 1 image per prompt round. Default: false. |
Flux AI models are available on many platforms. Here's what makes the Runflow image generation API different.
Nano Banana Pro delivers Google's highest image quality in the Nano Banana family — optimised for sharp detail and natural lighting.
Maintain consistent character appearance across up to 5 people in a single generation — ideal for storytelling, campaigns, and multi-character scenes.
Every output carries Google's SynthID digital watermark, invisibly embedded and robust to common edits — enabling attribution and provenance tracking.
Optional web search enables generation grounded in current events, recent product releases, and real-time visual references. +$0.015/image.
1K, 2K, and 4K resolution options in one model — choose per request based on your quality and cost requirements.
Every output is scored by Runflow's Sentinel system before delivery, catching low-quality or off-prompt results automatically.
Same API, different strengths. Switch models with one parameter change.
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Get API access in minutes. No GPU setup, no infrastructure to manage. Pair with Sentinel to control the quality of every AI-generated image you ship.