diff --git a/src/providers/google-vertex-ai/chatComplete.ts b/src/providers/google-vertex-ai/chatComplete.ts
index c7ed0fefd..2b412a497 100644
--- a/src/providers/google-vertex-ai/chatComplete.ts
+++ b/src/providers/google-vertex-ai/chatComplete.ts
@@ -337,6 +337,10 @@ export const VertexGoogleChatCompleteConfig: ProviderConfig = {
   labels: {
     param: 'labels',
   },
+  thinking: {
+    param: 'generationConfig',
+    transform: (params: Params) => transformGenerationConfig(params),
+  },
 };
 
 interface AnthorpicTextContentItem {
diff --git a/src/providers/google-vertex-ai/transformGenerationConfig.ts b/src/providers/google-vertex-ai/transformGenerationConfig.ts
index cd1aa231c..7d15142a1 100644
--- a/src/providers/google-vertex-ai/transformGenerationConfig.ts
+++ b/src/providers/google-vertex-ai/transformGenerationConfig.ts
@@ -50,5 +50,12 @@ export function transformGenerationConfig(params: Params) {
     generationConfig['responseSchema'] = schema;
   }
 
+  if (params?.thinking) {
+    const thinkingConfig: Record<string, any> = {};
+    thinkingConfig['include_thoughts'] = true;
+    thinkingConfig['thinking_budget'] = params.thinking.budget_tokens;
+    generationConfig['thinking_config'] = thinkingConfig;
+  }
+
   return generationConfig;
 }
diff --git a/src/providers/google/chatComplete.ts b/src/providers/google/chatComplete.ts
index 608305e86..1e2b67f8b 100644
--- a/src/providers/google/chatComplete.ts
+++ b/src/providers/google/chatComplete.ts
@@ -71,6 +71,12 @@ const transformGenerationConfig = (params: Params) => {
     }
     generationConfig['responseSchema'] = schema;
   }
+  if (params?.thinking) {
+    const thinkingConfig: Record<string, any> = {};
+    thinkingConfig['include_thoughts'] = true;
+    thinkingConfig['thinking_budget'] = params.thinking.budget_tokens;
+    generationConfig['thinking_config'] = thinkingConfig;
+  }
   return generationConfig;
 };
 
@@ -405,6 +411,10 @@ export const GoogleChatCompleteConfig: ProviderConfig = {
       }
     },
   },
+  thinking: {
+    param: 'generationConfig',
+    transform: (params: Params) => transformGenerationConfig(params),
+  },
 };
 
 export interface GoogleErrorResponse {
diff --git a/src/types/requestBody.ts b/src/types/requestBody.ts
index fd8042b61..2a4b74345 100644
--- a/src/types/requestBody.ts
+++ b/src/types/requestBody.ts
@@ -404,6 +404,10 @@ export interface Params {
   // Anthropic specific
   anthropic_beta?: string;
   anthropic_version?: string;
+  thinking?: {
+    type?: string;
+    budget_tokens: number;
+  };
 }
 
 interface Examples {