pytest workflow - retry with gpt-4 if gpt-4o fails

.github/workflows/pytest.yml

@@ -96,10 +96,19 @@ jobs:
         name: github-dependencies
         path: requirements_github.txt
 
-    - name: Run tests with coverage
+    - name: Run tests with coverage (exit on first failure)
+      id: first_test
       run: |
         poetry run coverage run --source=langroid -m pytest -x tests/main tests/extras/test_hf_embeddings.py
         poetry run coverage report
+      continue-on-error: true
+
+    - name: Retry pytest with gpt-4 instead of gpt-4o
+      if: steps.first_test.outcome == 'failure'
+      run: |
+        poetry run coverage run --source=langroid -m pytest -x tests/main tests/extras/test_hf_embeddings.py --m gpt-4
+        poetry run coverage report
+
     - name: Generate XML coverage report
       run: |
         poetry run coverage xml