diff --git a/.changeset/default-get-task-result-schema.md b/.changeset/default-get-task-result-schema.md
new file mode 100644
index 0000000000..4671b9ba8f
--- /dev/null
+++ b/.changeset/default-get-task-result-schema.md
@@ -0,0 +1,5 @@
+---
+'@modelcontextprotocol/sdk': patch
+---
+
+Default `resultSchema` to `CallToolResultSchema` in `ExperimentalClientTasks.getTaskResult`
diff --git a/src/experimental/tasks/client.ts b/src/experimental/tasks/client.ts
index f62941dc8f..274787fa6e 100644
--- a/src/experimental/tasks/client.ts
+++ b/src/experimental/tasks/client.ts
@@ -178,13 +178,15 @@ export class ExperimentalClientTasks<
      * Retrieves the result of a completed task.
      *
      * @param taskId - The task identifier
-     * @param resultSchema - Zod schema for validating the result
+     * @param resultSchema - Zod schema for validating the result (defaults to CallToolResultSchema)
      * @param options - Optional request options
      * @returns The task result
      *
      * @experimental
      */
-    async getTaskResult<T extends AnyObjectSchema>(taskId: string, resultSchema?: T, options?: RequestOptions): Promise<SchemaOutput<T>> {
+    async getTaskResult<
+        T extends typeof CallToolResultSchema | typeof CompatibilityCallToolResultSchema | AnyObjectSchema = typeof CallToolResultSchema
+    >(taskId: string, resultSchema: T = CallToolResultSchema as T, options?: RequestOptions): Promise<SchemaOutput<T>> {
         // Delegate to the client's underlying Protocol method
         return (
             this._client as unknown as {
diff --git a/test/client/index.test.ts b/test/client/index.test.ts
index f5c6a348d1..4aa407f688 100644
--- a/test/client/index.test.ts
+++ b/test/client/index.test.ts
@@ -2576,9 +2576,13 @@ describe('Task-based execution', () => {
 
             expect(taskId).toBeDefined();
 
-            // Query task result using the captured task ID
-            const result = await client.experimental.tasks.getTaskResult(taskId!, CallToolResultSchema);
-            expect(result.content).toEqual([{ type: 'text', text: 'Result data!' }]);
+            // Query task result using the captured task ID with default schema
+            const defaultResult = await client.experimental.tasks.getTaskResult(taskId!);
+            expect(defaultResult.content).toEqual([{ type: 'text', text: 'Result data!' }]);
+
+            // Query task result with explicit schema
+            const explicitResult = await client.experimental.tasks.getTaskResult(taskId!, CallToolResultSchema);
+            expect(explicitResult.content).toEqual([{ type: 'text', text: 'Result data!' }]);
         });
 
         test('should query task list from server using listTasks', async () => {