Nano Banana Pro

Provider	Google
Model name	Nano-Banana-Pro
Endpoint	/v1/chat/completions
Result	Markdown image content in choices[0].message.content
Pricing	See HiAPI Pricing

Nano Banana Pro is the higher-quality Nano Banana tier for brand campaigns, launch visuals, and assets where detail and typography matter.

Key Parameters

Parameter	Type	Notes
model	string	Use Nano-Banana-Pro
messages	array	Put the prompt in a user message
extra_body.google.image_config.aspect_ratio	string	Common values include 1:1, 16:9, 9:16, 3:4
extra_body.google.image_config.image_size	string	Common values include 1K, 2K, and 4K
stream	boolean	Set to false

Example

curl -X POST https://api.hiapi.ai/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "Nano-Banana-Pro",
    "stream": false,
    "messages": [{"role": "user", "content": "Create a premium smartwatch launch poster with dark background, brushed metal details, and clean English headline"}],
    "extra_body": {
      "google": {
        "image_config": {"aspect_ratio": "16:9", "image_size": "2K"}
      }
    }
  }'

Next Steps

• Read the Image Generation guide
• Compare with Nano Banana 2
• Review API Reference