From de0124a7e06d54127cd72da1ee30c68a87c9aa30 Mon Sep 17 00:00:00 2001
From: Monesh Ram <31161039+WhoisMonesh@users.noreply.github.com>
Date: Sat, 21 Feb 2026 17:14:58 +0530
Subject: [PATCH] fix(vertex_ai): conditionally add 'audio' only for TTS models
 in get_supported_openai_params

---
 .../vertex_ai/gemini/vertex_and_google_ai_studio_gemini.py     | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/litellm/llms/vertex_ai/gemini/vertex_and_google_ai_studio_gemini.py b/litellm/llms/vertex_ai/gemini/vertex_and_google_ai_studio_gemini.py
index 5aeb5be4c78..0cf9071107f 100644
--- a/litellm/llms/vertex_ai/gemini/vertex_and_google_ai_studio_gemini.py
+++ b/litellm/llms/vertex_ai/gemini/vertex_and_google_ai_studio_gemini.py
@@ -271,7 +271,6 @@ class VertexGeminiConfig(VertexAIBaseConfig, BaseConfig):
             "modalities",
             "parallel_tool_calls",
             "web_search_options",
-            "audio",
         ]
 
         # Add penalty parameters only for non-preview models
@@ -281,6 +280,8 @@ class VertexGeminiConfig(VertexAIBaseConfig, BaseConfig):
         if supports_reasoning(model):
             supported_params.append("reasoning_effort")
             supported_params.append("thinking")
+        if "tts" in model:
+            supported_params.append("audio")            
         return supported_params
 
     def map_tool_choice_values(