diff --git a/packages/sdk/js/src/v2/gen/types.gen.ts b/packages/sdk/js/src/v2/gen/types.gen.ts
index f8890d9fb..e99bac662 100644
--- a/packages/sdk/js/src/v2/gen/types.gen.ts
+++ b/packages/sdk/js/src/v2/gen/types.gen.ts
@@ -90,6 +90,9 @@ export type UserMessage = {
   tools?: {
     [key: string]: boolean
   }
+  thinking?: {
+    effort: "low" | "medium" | "high"
+  }
 }
 
 export type ProviderAuthError = {
diff --git a/packages/sdk/openapi.json b/packages/sdk/openapi.json
index 7c7c216f5..2c657ebc0 100644
--- a/packages/sdk/openapi.json
+++ b/packages/sdk/openapi.json
@@ -5023,6 +5023,16 @@
             "additionalProperties": {
               "type": "boolean"
             }
+          },
+          "thinking": {
+            "type": "object",
+            "properties": {
+              "effort": {
+                "type": "string",
+                "enum": ["low", "medium", "high"]
+              }
+            },
+            "required": ["effort"]
           }
         },
         "required": ["id", "sessionID", "role", "time", "agent", "model"]