diff --git a/notebooks/eval_osworld.ipynb b/notebooks/eval_osworld.ipynb
index 1bc58e48..27a56020 100644
--- a/notebooks/eval_osworld.ipynb
+++ b/notebooks/eval_osworld.ipynb
@@ -39,6 +39,7 @@
    "outputs": [],
    "source": [
     "from dotenv import load_dotenv\n",
+    "import os\n",
     "\n",
     "# Load environment variables from ../.env\n",
     "load_dotenv(dotenv_path='../.env')\n",
@@ -47,6 +48,8 @@
     "# - HUD_API_KEY (for HUD access)\n",
     "# - ANTHROPIC_API_KEY (for Claude models)\n",
     "# - OPENAI_API_KEY (for OpenAI models)\n",
+    "assert os.getenv('HUD_API_KEY') is not None\n",
+    "assert os.getenv('ANTHROPIC_API_KEY') is not None or os.getenv('OPENAI_API_KEY') is not None\n",
     "\n",
     "from pprint import pprint"
    ]
@@ -72,7 +75,7 @@
     "# You can swap \"hud-evals/OSWorld-Verified\" -> \"hud-evals/SheetBench-V2\" to test SheetBench.\n",
     "await run_single_task(\n",
     "    dataset=\"hud-evals/OSWorld-Verified\",\n",
-    "    model=\"openai/computer-use-preview+openai/gpt-5-nano\",  # or any supported model string\n",
+    "    model=\"openai/computer-use-preview+openai/gpt-5\",  # or any supported model string\n",
     "    task_id=155 # open last tab task (easy)\n",
     ")"
    ]