Revert MODEL_FALLBACK_ORDER to upstream values

Model optimization (mini-first fallback, is_search_capable_model) belongs
in PR #67. This PR stays focused on endpoint/API fixes only.

Also fixes pre-existing test bug where test asserted gpt-4o was first in
MODEL_FALLBACK_ORDER when it was actually gpt-4.1.

scripts/lib/openai_reddit.py

@@ -8,9 +8,8 @@ from typing import Any, Dict, List, Optional
 from . import http, env
 
 # Fallback models when the selected model isn't accessible (e.g., org not verified for GPT-5)
-# gpt-5-mini: $0.25/1M input (8x cheaper than gpt-4.1), supports web_search with filters
+# Note: gpt-4o-mini does NOT support web_search with filters param, so exclude it
-# gpt-4o-mini does NOT support web_search with filters param, so exclude it
+MODEL_FALLBACK_ORDER = ["gpt-4.1", "gpt-4o"]
-MODEL_FALLBACK_ORDER = ["gpt-5-mini", "gpt-4.1-mini", "gpt-4.1"]
 
 
 def _log_error(msg: str):

tests/test_openai_reddit.py

@@ -64,13 +64,13 @@ class TestIsModelAccessError(unittest.TestCase):
 class TestModelFallbackOrder(unittest.TestCase):
     """Tests for MODEL_FALLBACK_ORDER constant."""
 
-    def test_contains_gpt41(self):
+    def test_contains_gpt4o(self):
-        """Fallback list should include gpt-4.1 as last resort."""
+        """Fallback list should include gpt-4o."""
-        self.assertIn("gpt-4.1", MODEL_FALLBACK_ORDER)
+        self.assertIn("gpt-4o", MODEL_FALLBACK_ORDER)
 
-    def test_gpt5_mini_is_first(self):
+    def test_gpt41_is_first(self):
-        """gpt-5-mini should be the first fallback option (cheapest with web_search support)."""
+        """gpt-4.1 should be the first fallback option."""
-        self.assertEqual(MODEL_FALLBACK_ORDER[0], "gpt-5-mini")
+        self.assertEqual(MODEL_FALLBACK_ORDER[0], "gpt-4.1")
 
 
 if __name__ == "__main__":