From bd134fa2db777c617c881590bf3cec4ad8f189f9 Mon Sep 17 00:00:00 2001
From: Cole McIntosh <82463175+colesmcintosh@users.noreply.github.com>
Date: Sat, 19 Jul 2025 16:10:57 -0600
Subject: [PATCH] Fix MoonshotChatConfig to address limitations of
 kimi-thinking-preview model by excluding additional parameters (#12772)

---
 litellm/llms/moonshot/chat/transformation.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/litellm/llms/moonshot/chat/transformation.py b/litellm/llms/moonshot/chat/transformation.py
index 1b67e315d74..0e78e58c7f8 100644
--- a/litellm/llms/moonshot/chat/transformation.py
+++ b/litellm/llms/moonshot/chat/transformation.py
@@ -83,8 +83,14 @@ class MoonshotChatConfig(OpenAIGPTConfig):
         Moonshot AI limitations:
         - functions parameter is not supported (use tools instead)
         - tool_choice doesn't support "required" value
+        - kimi-thinking-preview doesn't support tool calls at all
         """
         excluded_params: List[str] = ["functions"]
+        
+        # kimi-thinking-preview has additional limitations
+        if "kimi-thinking-preview" in model:
+            excluded_params.extend(["tools", "tool_choice"])
+        
         base_openai_params = super().get_supported_openai_params(model=model)
         final_params: List[str] = []
         for param in base_openai_params: