fix(model-info): hydrate created_at/created_by/updated_at from row columns for all users

/v1/model/info and /v2/model/info are admin-scoped: the caller already has
access to this metadata. The response schema exposes the fields as optional,
and the Admin UI renders model_info.created_at / created_by unconditionally,
so free-tier admins saw "Unknown" placeholders even though the data existed
in the LiteLLM_ProviderModelTable row.

Hydrate the four system-managed metadata fields from row top-level columns
unconditionally in get_model_info_with_id. Config-file models have no such
row attributes, so nothing changes for them.

litellm/proxy/proxy_server.py

@@ -5769,12 +5769,14 @@ class ProxyConfig:
             model.model_info["db_model"] = True
             model.model_info["blocked"] = bool(getattr(model, "blocked", False))
 
-        if premium_user is True:
-            # seeing "created_at", "updated_at", "created_by", "updated_by" is a LiteLLM Enterprise Feature
-            model.model_info["created_at"] = getattr(model, "created_at", None)
-            model.model_info["updated_at"] = getattr(model, "updated_at", None)
-            model.model_info["created_by"] = getattr(model, "created_by", None)
-            model.model_info["updated_by"] = getattr(model, "updated_by", None)
+        # Hydrate system-managed metadata unconditionally: /model/info endpoints
+        # are admin-scoped, so the caller already has access to this data.
+        # Config-file models have no row attributes -> nothing is injected.
+        if isinstance(model.model_info, dict):
+            for field_name in ("created_at", "updated_at", "created_by", "updated_by"):
+                field_value = getattr(model, field_name, None)
+                if field_value is not None:
+                    model.model_info[field_name] = field_value
 
         if model.model_info is not None and isinstance(model.model_info, dict):
             if "id" not in model.model_info:

tests/test_litellm/proxy/proxy_server/test_proxy_config.py

@@ -1871,6 +1871,28 @@ def test_ProxyConfig_get_model_info_with_id_missing_model_id_raises(monkeypatch)
         pc.get_model_info_with_id(model=bad)
 
 
+def test_ProxyConfig_get_model_info_with_id_hydrates_metadata_without_premium(monkeypatch):
+    """DB-row created_at/created_by/updated_at/updated_by are served to non-premium
+    users: /model/info is admin-scoped, so the caller already has access."""
+    monkeypatch.setattr("litellm.proxy.proxy_server.premium_user", False)
+    from datetime import datetime, timezone
+
+    pc = ProxyConfig()
+    now = datetime.now(timezone.utc)
+    model = SimpleNamespace(
+        model_id="m-2",
+        model_info={"id": "m-2"},
+        blocked=False,
+        created_at=now,
+        updated_at=now,
+        created_by="user-1",
+        updated_by="user-1",
+    )
+    out = pc.get_model_info_with_id(model=model, db_model=True)
+    assert str(out.created_at) == str(now)
+    assert out.created_by == "user-1"
+
+
 # ---------------------------------------------------------------------------
 # ProxyConfig._delete_deployment
 # ---------------------------------------------------------------------------