feat: launch Gemini 3 Flash in Gemini CLI ⚡️⚡️⚡️ (#15196)

Co-authored-by: gemini-cli-robot <gemini-cli-robot@google.com>
Co-authored-by: joshualitt <joshualitt@google.com>
Co-authored-by: Sehoon Shon <sshon@google.com>
Co-authored-by: Adam Weidman <65992621+adamfweidman@users.noreply.github.com>
Co-authored-by: Adib234 <30782825+Adib234@users.noreply.github.com>
Co-authored-by: Jenna Inouye <jinouye@google.com>

packages/core/src/routing/strategies/classifierStrategy.ts

@@ -12,11 +12,7 @@ import type {
   RoutingDecision,
   RoutingStrategy,
 } from '../routingStrategy.js';
-import {
-  GEMINI_MODEL_ALIAS_FLASH,
-  GEMINI_MODEL_ALIAS_PRO,
-  resolveModel,
-} from '../../config/models.js';
+import { resolveClassifierModel } from '../../config/models.js';
 import { createUserContent, Type } from '@google/genai';
 import type { Config } from '../../config/config.js';
 import {
@@ -171,32 +167,20 @@ export class ClassifierStrategy implements RoutingStrategy {
 
       const reasoning = routerResponse.reasoning;
       const latencyMs = Date.now() - startTime;
+      const selectedModel = resolveClassifierModel(
+        config.getModel(),
+        routerResponse.model_choice,
+        config.getPreviewFeatures(),
+      );
 
-      if (routerResponse.model_choice === FLASH_MODEL) {
-        return {
-          model: resolveModel(
-            GEMINI_MODEL_ALIAS_FLASH,
-            config.getPreviewFeatures(),
-          ),
-          metadata: {
-            source: 'Classifier',
-            latencyMs,
-            reasoning,
-          },
-        };
-      } else {
-        return {
-          model: resolveModel(
-            GEMINI_MODEL_ALIAS_PRO,
-            config.getPreviewFeatures(),
-          ),
-          metadata: {
-            source: 'Classifier',
-            reasoning,
-            latencyMs,
-          },
-        };
-      }
+      return {
+        model: selectedModel,
+        metadata: {
+          source: 'Classifier',
+          latencyMs,
+          reasoning,
+        },
+      };
     } catch (error) {
       // If the classifier fails for any reason (API error, parsing error, etc.),
       // we log it and return null to allow the composite strategy to proceed.