diff --git a/litellm/proxy/pass_through_endpoints/llm_passthrough_endpoints.py b/litellm/proxy/pass_through_endpoints/llm_passthrough_endpoints.py
index 2a536b9ffd1..3731abe3134 100644
--- a/litellm/proxy/pass_through_endpoints/llm_passthrough_endpoints.py
+++ b/litellm/proxy/pass_through_endpoints/llm_passthrough_endpoints.py
@@ -50,6 +50,7 @@ from litellm.constants import (
 from litellm.exceptions import BlockedPiiEntityError, GuardrailRaisedException
 from litellm.integrations.custom_guardrail import guardrail_request_data_with_streaming, is_guardrail_intervention
 from litellm.litellm_core_utils.aws_partition import get_aws_dns_suffix
+from litellm.litellm_core_utils.get_llm_provider_logic import resolve_model_and_provider_for_metadata
 from litellm.llms.anthropic.common_utils import AnthropicModelInfo, merge_anthropic_beta_headers
 from litellm.llms.azure.passthrough.transformation import (
     foreign_azure_deployment,
@@ -3927,7 +3928,7 @@ def _vertex_upstream_model(deployment: DeploymentTypedDict) -> str | None:
         return None
     upstream: Final = litellm_params["model"]
     try:
-        _, provider, _, _ = litellm.get_llm_provider(
+        _, provider = resolve_model_and_provider_for_metadata(
             model=upstream, custom_llm_provider=litellm_params.get("custom_llm_provider")
         )
     except litellm.exceptions.BadRequestError:
diff --git a/tests/unit/proxy/pass_through_endpoints/test_pass_through_endpoints.py b/tests/unit/proxy/pass_through_endpoints/test_pass_through_endpoints.py
index 6452b6c7ccf..8bd2106e8cd 100644
--- a/tests/unit/proxy/pass_through_endpoints/test_pass_through_endpoints.py
+++ b/tests/unit/proxy/pass_through_endpoints/test_pass_through_endpoints.py
@@ -12,6 +12,7 @@ from contextlib import ExitStack, contextmanager
 from dataclasses import dataclass
 from datetime import datetime
 from io import BytesIO
+from pathlib import Path
 from types import MappingProxyType, ModuleType, SimpleNamespace
 from typing import Final, Optional, cast
 from unittest.mock import AsyncMock, MagicMock, patch
@@ -8055,6 +8056,35 @@ async def test_vertex_live_full_path_whose_every_name_is_taken_by_another_model_
     assert (_policy_close_reason(websocket) is None) is reaches_vertex
 
 
+@pytest.mark.asyncio
+async def test_vertex_live_setup_frame_never_refreshes_the_token_of_a_chatgpt_group_on_the_same_proxy(
+    monkeypatch: pytest.MonkeyPatch, tmp_path: Path
+):
+    (tmp_path / "auth.json").write_text(
+        json.dumps({"access_token": "expired", "refresh_token": "refresh", "expires_at": 0})
+    )
+    monkeypatch.setenv("CHATGPT_TOKEN_DIR", str(tmp_path))
+    monkeypatch.delenv("CHATGPT_AUTH_FILE", raising=False)
+    llm_router: Final = litellm.Router(
+        model_list=[
+            {"model_name": "codex", "litellm_params": {"model": "chatgpt/gpt-5.4"}},
+            {"model_name": "native-audio", "litellm_params": {"model": f"vertex_ai/{VERTEX_LIVE_GROUP}"}},
+        ]
+    )
+
+    with respx.mock(assert_all_called=False) as transport:
+        outbound: Final = transport.route().respond(500)
+        websocket, upstream_ws = await _run_vertex_live_gated_passthrough(
+            [_setup_frame("native-audio")],
+            UserAPIKeyAuth(token="hashed", models=["native-audio"]),
+            llm_router=llm_router,
+        )
+
+    assert not outbound.called
+    upstream_ws.send.assert_awaited_once()
+    assert _policy_close_reason(websocket) is None
+
+
 @pytest.mark.asyncio
 @pytest.mark.parametrize(
     "valid_token",