diff --git a/airflow/api_fastapi/core_api/datamodels/task_instances.py b/airflow/api_fastapi/core_api/datamodels/task_instances.py
index a778c1bd62e28..1c5c5f3f136fc 100644
--- a/airflow/api_fastapi/core_api/datamodels/task_instances.py
+++ b/airflow/api_fastapi/core_api/datamodels/task_instances.py
@@ -203,3 +203,4 @@ class TaskInstanceReferenceCollectionResponse(BaseModel):
     """Task Instance Reference collection serializer for responses."""
 
     task_instances: list[TaskInstanceReferenceResponse]
+    total_entries: int
diff --git a/airflow/api_fastapi/core_api/openapi/v1-generated.yaml b/airflow/api_fastapi/core_api/openapi/v1-generated.yaml
index 30b7ce6e4e13a..85cbeaabd477d 100644
--- a/airflow/api_fastapi/core_api/openapi/v1-generated.yaml
+++ b/airflow/api_fastapi/core_api/openapi/v1-generated.yaml
@@ -7006,9 +7006,13 @@ components:
             $ref: '#/components/schemas/TaskInstanceReferenceResponse'
           type: array
           title: Task Instances
+        total_entries:
+          type: integer
+          title: Total Entries
       type: object
       required:
       - task_instances
+      - total_entries
       title: TaskInstanceReferenceCollectionResponse
       description: Task Instance Reference collection serializer for responses.
     TaskInstanceReferenceResponse:
diff --git a/airflow/api_fastapi/core_api/routes/public/task_instances.py b/airflow/api_fastapi/core_api/routes/public/task_instances.py
index 8b1440eedab86..8f3fe7af6381d 100644
--- a/airflow/api_fastapi/core_api/routes/public/task_instances.py
+++ b/airflow/api_fastapi/core_api/routes/public/task_instances.py
@@ -568,5 +568,6 @@ def post_clear_task_instances(
                 from_attributes=True,
             )
             for ti in task_instances
-        ]
+        ],
+        total_entries=len(task_instances),
     )
diff --git a/airflow/ui/openapi-gen/requests/schemas.gen.ts b/airflow/ui/openapi-gen/requests/schemas.gen.ts
index 714a9899a6225..55f897bef0807 100644
--- a/airflow/ui/openapi-gen/requests/schemas.gen.ts
+++ b/airflow/ui/openapi-gen/requests/schemas.gen.ts
@@ -3453,9 +3453,13 @@ export const $TaskInstanceReferenceCollectionResponse = {
       type: "array",
       title: "Task Instances",
     },
+    total_entries: {
+      type: "integer",
+      title: "Total Entries",
+    },
   },
   type: "object",
-  required: ["task_instances"],
+  required: ["task_instances", "total_entries"],
   title: "TaskInstanceReferenceCollectionResponse",
   description: "Task Instance Reference collection serializer for responses.",
 } as const;
diff --git a/airflow/ui/openapi-gen/requests/types.gen.ts b/airflow/ui/openapi-gen/requests/types.gen.ts
index ef7c131333fd8..33a302e6cb8fc 100644
--- a/airflow/ui/openapi-gen/requests/types.gen.ts
+++ b/airflow/ui/openapi-gen/requests/types.gen.ts
@@ -859,6 +859,7 @@ export type TaskInstanceHistoryResponse = {
  */
 export type TaskInstanceReferenceCollectionResponse = {
   task_instances: Array<TaskInstanceReferenceResponse>;
+  total_entries: number;
 };
 
 /**
diff --git a/tests/api_fastapi/core_api/routes/public/test_task_instances.py b/tests/api_fastapi/core_api/routes/public/test_task_instances.py
index 74547fa74ff0c..20d9b3bae21d1 100644
--- a/tests/api_fastapi/core_api/routes/public/test_task_instances.py
+++ b/tests/api_fastapi/core_api/routes/public/test_task_instances.py
@@ -1836,7 +1836,7 @@ def test_should_respond_200(
             json=payload,
         )
         assert response.status_code == 200
-        assert len(response.json()["task_instances"]) == expected_ti
+        assert response.json()["total_entries"] == expected_ti
 
     @mock.patch("airflow.api_fastapi.core_api.routes.public.task_instances.clear_task_instances")
     def test_clear_taskinstance_is_called_with_queued_dr_state(self, mock_clearti, test_client, session):
@@ -1975,7 +1975,7 @@ def test_should_respond_200_with_reset_dag_run(self, test_client, session):
         ]
         for task_instance in expected_response:
             assert task_instance in response.json()["task_instances"]
-        assert 6 == len(response.json()["task_instances"])
+        assert 6 == response.json()["total_entries"]
         assert 0 == failed_dag_runs, 0
 
     def test_should_respond_200_with_dag_run_id(self, test_client, session):
@@ -2033,7 +2033,7 @@ def test_should_respond_200_with_dag_run_id(self, test_client, session):
             },
         ]
         assert response.json()["task_instances"] == expected_response
-        assert 1 == len(response.json()["task_instances"])
+        assert 1 == response.json()["total_entries"]
 
     def test_should_respond_200_with_include_past(self, test_client, session):
         dag_id = "example_python_operator"
@@ -2121,7 +2121,7 @@ def test_should_respond_200_with_include_past(self, test_client, session):
         ]
         for task_instance in expected_response:
             assert task_instance in response.json()["task_instances"]
-        assert 6 == len(response.json()["task_instances"])
+        assert 6 == response.json()["total_entries"]
 
     def test_should_respond_200_with_include_future(self, test_client, session):
         dag_id = "example_python_operator"
@@ -2210,7 +2210,7 @@ def test_should_respond_200_with_include_future(self, test_client, session):
         ]
         for task_instance in expected_response:
             assert task_instance in response.json()["task_instances"]
-        assert 6 == len(response.json()["task_instances"])
+        assert 6 == response.json()["total_entries"]
 
     def test_should_respond_404_for_nonexistent_dagrun_id(self, test_client, session):
         dag_id = "example_python_operator"