Gemini nano banana pro updated (#2012)

* Update AI.js

* Update GeminiImageGenerationService.js

* Update cost map

* Gemini to OpenAI SDK refactor (#2014)

* WIP Gemini OpenAI refactor

* refactor: gemini open ai service + geminiCostMap

* Gemini Service fixes

* Cleaning up old Gemini cruft

---------

Co-authored-by: Daniel Salazar <daniel.salazar@puter.com>

---------

Co-authored-by: Nihhaar0002 <msnrk2006@gmail.com>
Co-authored-by: Daniel Salazar <daniel.salazar@puter.com>

src/backend/src/modules/puterai/GeminiImageGenerationService.js

@@ -42,6 +42,9 @@ class GeminiImageGenerationService extends BaseService {
             'gemini-2.5-flash-image-preview': {
                 '1024x1024': 0.039,
             },
+            'gemini-3-pro-image-preview': {
+                '1024x1024': 0.156,
+            },
         };
     }
 
@@ -192,9 +195,10 @@ class GeminiImageGenerationService extends BaseService {
         }
 
         const response = await this.genAI.models.generateContent({
-            model: 'gemini-2.5-flash-image-preview',
-            contents: contents,
+            model,
+            contents,
         });
+
         // Metering usage tracking
         // Gemini usage: always 1 image, resolution, cost, model
         this.meteringService.incrementUsage(actor, usageType, 1);
@@ -221,10 +225,14 @@ class GeminiImageGenerationService extends BaseService {
      * @returns {Array<Object>} Array of valid ratio objects
      * @private
      */
-    _getValidRatios (model) {
-        if ( model === 'gemini-2.5-flash-image-preview' ) {
+    _getValidRatios(model) {
+        if (
+            model === 'gemini-2.5-flash-image-preview' ||
+            model === 'gemini-3-pro-image-preview'
+        ) {
             return [this.constructor.RATIO_SQUARE];
         }
+        return [];
     }
 
     _validate_ratio (ratio, model) {

src/backend/src/services/MeteringService/costMaps/geminiCostMap.ts

@@ -24,4 +24,5 @@ export const GEMINI_COST_MAP = {
     'gemini:gemini-3-pro-preview:promptTokenCount': 25,
     'gemini:gemini-3-pro-preview:candidatesTokenCount': 100,
     'gemini:gemini-2.5-flash-image-preview:1024x1024': 3_900_000,
+    'gemini:gemini-3-pro-image-preview:1024x1024': 15_600_000
 };

src/puter-js/src/modules/AI.js

@@ -1001,6 +1001,10 @@ class AI {
             options.model = 'gemini-2.5-flash-image-preview';
         }
 
+        if (options.model === "nano-banana-pro") {
+            options.model = "gemini-3-pro-image-preview";
+        }
+
         const driverHint = typeof options.driver === 'string' ? options.driver : undefined;
         const providerRaw = typeof options.provider === 'string'
             ? options.provider
@@ -1019,7 +1023,7 @@ class AI {
             AIService = 'gemini-image-generation';
         } else if ( providerHint === 'together' || providerHint === 'together-ai' ) {
             AIService = 'together-image-generation';
-        } else if ( options.model === 'gemini-2.5-flash-image-preview' ) {
+        } else if (options.model === 'gemini-2.5-flash-image-preview' || options.model === "gemini-3-pro-image-preview" ) {
             AIService = 'gemini-image-generation';
         } else if ( looksLikeTogetherModel ) {
             AIService = 'together-image-generation';