diff --git a/backend/crates/gateway-api/src/openai/models.rs b/backend/crates/gateway-api/src/openai/models.rs
index 7d6357526..ed42b0e9b 100644
--- a/backend/crates/gateway-api/src/openai/models.rs
+++ b/backend/crates/gateway-api/src/openai/models.rs
@@ -39,7 +39,15 @@ pub(crate) async fn models(State(state): State<ApiState>, headers: HeaderMap) ->
             .enumerate()
             .map(|(index, profile)| codex_model_json(profile, index))
             .collect::<Vec<_>>();
-        return (StatusCode::OK, Json(json!({ "models": models }))).into_response();
+        return (
+            StatusCode::OK,
+            Json(json!({
+                "object": "list",
+                "data": data,
+                "models": models,
+            })),
+        )
+            .into_response();
     }
 
     (
diff --git a/backend/crates/gateway-api/tests/openai/models.rs b/backend/crates/gateway-api/tests/openai/models.rs
index 7ddb559c4..aa3ea104e 100644
--- a/backend/crates/gateway-api/tests/openai/models.rs
+++ b/backend/crates/gateway-api/tests/openai/models.rs
@@ -163,6 +163,33 @@ async fn models_should_encode_provider_profiles_for_current_codex_clients() {
     );
 }
 
+#[tokio::test]
+async fn models_with_provider_profiles_should_keep_the_openai_list_contract() {
+    let response = api_router(ModelsExecution::with_profiles())
+        .await
+        .oneshot(authorized_request("/v1/models"))
+        .await
+        .expect("list compatible models response");
+    let body = to_bytes(response.into_body(), usize::MAX)
+        .await
+        .expect("read compatible models body");
+    let value: serde_json::Value = serde_json::from_slice(&body).expect("models JSON");
+
+    assert_eq!(
+        serde_json::json!({
+            "object": value["object"],
+            "data": value["data"],
+        }),
+        serde_json::json!({
+            "object": "list",
+            "data": [
+                {"id":"model-a","object":"model","created":1700000000_i64,"owned_by":"gateway"},
+                {"id":"model-b","object":"model","created":1700000000_i64,"owned_by":"gateway"}
+            ]
+        })
+    );
+}
+
 #[tokio::test]
 async fn model_detail_should_keep_the_official_path_id_contract() {
     let response = api_router(ModelsExecution::new())