diff --git a/litellm/llms/github_copilot/chat/transformation.py b/litellm/llms/github_copilot/chat/transformation.py
index e71e9b610b..2aab0207ca 100644
--- a/litellm/llms/github_copilot/chat/transformation.py
+++ b/litellm/llms/github_copilot/chat/transformation.py
@@ -81,14 +81,19 @@ class GithubCopilotConfig(OpenAIConfig):
         """
         Get supported OpenAI parameters for GitHub Copilot.
 
-        For Anthropic models (like claude-sonnet-4), includes thinking and reasoning parameters.
+        For Claude models that support extended thinking (Claude 4 family and Claude 3-7), includes thinking and reasoning_effort parameters.
         For other models, returns standard OpenAI parameters (which may include reasoning_effort for o-series models).
         """
+        from litellm.utils import supports_reasoning
+        
         # Get base OpenAI parameters
         base_params = super().get_supported_openai_params(model)
 
-        # Add Claude-specific parameters for Anthropic models
-        if "claude" in model.lower():
+        # Add Claude-specific parameters for models that support extended thinking
+        if "claude" in model.lower() and supports_reasoning(
+            model=model,
+            custom_llm_provider="github_copilot",
+        ):
             if "thinking" not in base_params:
                 base_params.append("thinking")
             # reasoning_effort is not included by parent for Claude models, so add it