feat(models): add gemini-3.1-pro-preview and update gemini-3-pro thinking levels (#3263)

Author: waleedlatif1

apps/sim/app/api/tools/stt/route.ts

@@ -766,7 +766,7 @@ async function transcribeWithGemini(
     const error = await response.json()
     if (response.status === 404) {
       throw new Error(
-        `Model not found: ${modelName}. Use gemini-3-pro-preview, gemini-2.5-pro, gemini-2.5-flash, gemini-2.5-flash-lite, or gemini-2.0-flash-exp`
+        `Model not found: ${modelName}. Use gemini-3.1-pro-preview, gemini-3-pro-preview, gemini-2.5-pro, gemini-2.5-flash, gemini-2.5-flash-lite, or gemini-2.0-flash-exp`
       )
     }
     const errorMessage = error.error?.message || JSON.stringify(error)

apps/sim/blocks/blocks/stt.ts

@@ -94,6 +94,7 @@ export const SttBlock: BlockConfig<SttBlockResponse> = {
       type: 'dropdown',
       condition: { field: 'provider', value: 'gemini' },
       options: [
+        { label: 'Gemini 3.1 Pro', id: 'gemini-3.1-pro-preview' },
         { label: 'Gemini 3 Pro', id: 'gemini-3-pro-preview' },
         { label: 'Gemini 2.5 Pro', id: 'gemini-2.5-pro' },
         { label: 'Gemini 2.5 Flash', id: 'gemini-2.5-flash' },

apps/sim/blocks/blocks/vision.ts

@@ -13,6 +13,7 @@ const VISION_MODEL_OPTIONS = [
   { label: 'Claude Opus 4.5', id: 'claude-opus-4-5' },
   { label: 'Claude Sonnet 4.5', id: 'claude-sonnet-4-5' },
   { label: 'Claude Haiku 4.5', id: 'claude-haiku-4-5' },
+  { label: 'Gemini 3.1 Pro Preview', id: 'gemini-3.1-pro-preview' },
   { label: 'Gemini 3 Pro Preview', id: 'gemini-3-pro-preview' },
   { label: 'Gemini 3 Flash Preview', id: 'gemini-3-flash-preview' },
   { label: 'Gemini 2.5 Pro', id: 'gemini-2.5-pro' },

apps/sim/providers/models.ts

@@ -834,6 +834,23 @@ export const PROVIDER_DEFINITIONS: Record<string, ProviderDefinition> = {
     },
     icon: GeminiIcon,
     models: [
+      {
+        id: 'gemini-3.1-pro-preview',
+        pricing: {
+          input: 2.0,
+          cachedInput: 0.2,
+          output: 12.0,
+          updatedAt: '2026-02-19',
+        },
+        capabilities: {
+          temperature: { min: 0, max: 2 },
+          thinking: {
+            levels: ['low', 'medium', 'high'],
+            default: 'high',
+          },
+        },
+        contextWindow: 1048576,
+      },
       {
         id: 'gemini-3-pro-preview',
         pricing: {
@@ -845,7 +862,7 @@ export const PROVIDER_DEFINITIONS: Record<string, ProviderDefinition> = {
         capabilities: {
           temperature: { min: 0, max: 2 },
           thinking: {
-            levels: ['low', 'high'],
+            levels: ['low', 'medium', 'high'],
             default: 'high',
           },
         },
@@ -957,6 +974,23 @@ export const PROVIDER_DEFINITIONS: Record<string, ProviderDefinition> = {
       toolUsageControl: true,
     },
     models: [
+      {
+        id: 'vertex/gemini-3.1-pro-preview',
+        pricing: {
+          input: 2.0,
+          cachedInput: 0.2,
+          output: 12.0,
+          updatedAt: '2026-02-19',
+        },
+        capabilities: {
+          temperature: { min: 0, max: 2 },
+          thinking: {
+            levels: ['low', 'medium', 'high'],
+            default: 'high',
+          },
+        },
+        contextWindow: 1048576,
+      },
       {
         id: 'vertex/gemini-3-pro-preview',
         pricing: {
@@ -968,7 +1002,7 @@ export const PROVIDER_DEFINITIONS: Record<string, ProviderDefinition> = {
         capabilities: {
           temperature: { min: 0, max: 2 },
           thinking: {
-            levels: ['low', 'high'],
+            levels: ['low', 'medium', 'high'],
             default: 'high',
           },
         },