feat(models): add gemini 3.5 flash (#4660)

Author: waleedlatif1

apps/sim/providers/models.ts

@@ -1204,6 +1204,26 @@ export const PROVIDER_DEFINITIONS: Record<string, ProviderDefinition> = {
     icon: GeminiIcon,
     color: '#4285F4',
     models: [
+      {
+        id: 'gemini-3.5-flash',
+        pricing: {
+          input: 1.5,
+          cachedInput: 0.15,
+          output: 9.0,
+          updatedAt: '2026-05-19',
+        },
+        capabilities: {
+          temperature: { min: 0, max: 2 },
+          thinking: {
+            levels: ['minimal', 'low', 'medium', 'high'],
+            default: 'medium',
+          },
+          maxOutputTokens: 65536,
+        },
+        contextWindow: 1048576,
+        releaseDate: '2026-05-19',
+        recommended: true,
+      },
       {
         id: 'gemini-3.1-pro-preview',
         pricing: {
@@ -1222,7 +1242,6 @@ export const PROVIDER_DEFINITIONS: Record<string, ProviderDefinition> = {
         },
         contextWindow: 1048576,
         releaseDate: '2026-02-19',
-        recommended: true,
       },
       {
         id: 'gemini-3.1-flash-lite-preview',
@@ -1366,6 +1385,24 @@ export const PROVIDER_DEFINITIONS: Record<string, ProviderDefinition> = {
       toolUsageControl: true,
     },
     models: [
+      {
+        id: 'vertex/gemini-3.5-flash',
+        pricing: {
+          input: 1.5,
+          cachedInput: 0.15,
+          output: 9.0,
+          updatedAt: '2026-05-19',
+        },
+        capabilities: {
+          temperature: { min: 0, max: 2 },
+          thinking: {
+            levels: ['minimal', 'low', 'medium', 'high'],
+            default: 'medium',
+          },
+        },
+        contextWindow: 1048576,
+        releaseDate: '2026-05-19',
+      },
       {
         id: 'vertex/gemini-3.1-pro-preview',
         pricing: {