Add GPT-4o model detection for max_completion_tokens conversion

GPT-4o models (gpt-4o, gpt-4o-mini, gpt-4o-2024-*, etc.) also require
max_completion_tokens instead of max_tokens.

Updated _is_new_generation_model() to detect all GPT-4o variants.

Fixes: "Unsupported parameter: 'max_tokens' is not supported with this model"

Co-authored-by: owndev <69784886+owndev@users.noreply.github.com>

Author: Claude

pipelines/azure/azure_ai_foundry.py

@@ -1489,11 +1489,11 @@ def _is_new_generation_model(self, model_name: str) -> bool:
         """
         Determine if a model requires max_completion_tokens instead of max_tokens.
 
-        GPT-5, o-series (o1, o3, o4), and reasoning models use max_completion_tokens
+        GPT-4o, GPT-5, o-series (o1, o3, o4), and reasoning models use max_completion_tokens
         to distinguish between internal reasoning tokens and output completion tokens.
 
         Args:
-            model_name: The model identifier (e.g., "gpt-5", "o1", "gpt-4")
+            model_name: The model identifier (e.g., "gpt-4o", "gpt-5", "o1", "gpt-4")
 
         Returns:
             True if the model requires max_completion_tokens, False otherwise
@@ -1503,6 +1503,10 @@ def _is_new_generation_model(self, model_name: str) -> bool:
 
         model_lower = model_name.lower()
 
+        # GPT-4o series models (gpt-4o, gpt-4o-mini, gpt-4o-2024-*, gpt-4o-realtime-preview, etc.)
+        if "gpt-4o" in model_lower or model_lower.startswith("gpt-4o"):
+            return True
+
         # GPT-5 series models
         if model_lower.startswith("gpt-5") or model_lower.startswith("gpt‑5"):
             return True