joshu

Google: Gemini 3 Pro Image (Nano Banana Pro)

From Google AI (Gemini API), through Joshu Data Bodega.

Part of Image generation gemini 3 pro image generate.

Price
$0.286 per call

No calls measured in the last 30 days.

Prices include the router's 10% markup and are paid from the usage wallet. Checked on November 11, 2026.

Inputs

  • fieldsstring, optional

    Google's partial-response mask. The example drops the multi-megabyte thoughtSignature and roughly halves the answer; keep usageMetadata in any mask you send.

  • contentsarray, required

    One user turn: {parts: [{text: prompt}, ...references]}. A reference image is {fileData: {mimeType: image/png, fileUri: public https URL }} (Google fetches it; `treg host file ` prints a URL that works) or {inlineData: {mimeType, data: base64 }} (a 10 MB request carrying a 7.5 MB image worked live). Up to 14 references; each bills 258 input tokens whatever its size.

  • generationConfigobject, required

Call it

Router call with a router API key
curl https://hello.joshu.me/api/router/call \
  -H "Authorization: Bearer $JOSHU_ROUTER_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "endpoint": "google-ai.image-gen.gemini-3-pro-image",
    "params": {
      "fields": "candidates(content(parts(text,inlineData)),finishReason),usageMetadata,modelVersion,responseId,promptFeedback",
      "contents": [
        {
          "parts": [
            {
              "text": "A clean editorial illustration of a paper airplane."
            }
          ]
        }
      ],
      "generationConfig": {
        "imageConfig": {
          "imageSize": "1K",
          "aspectRatio": "1:1"
        },
        "responseModalities": [
          "IMAGE"
        ]
      }
    }
  }'