diff --git a/docs/reference/tools-reference/openai-gpt-4v-tool.md b/docs/reference/tools-reference/openai-gpt-4v-tool.md
index 59ab1062ad4..f5dee3b0d13 100644
--- a/docs/reference/tools-reference/openai-gpt-4v-tool.md
+++ b/docs/reference/tools-reference/openai-gpt-4v-tool.md
@@ -35,7 +35,6 @@ Setup connections to provisioned resources in prompt flow.
 | top_p                  | float       | the probability of using the top choice from the generated tokens. Default is 1.               | No       |
 | presence\_penalty      | float       | value that controls the model's behavior with regards to repeating phrases. Default is 0.      | No       |
 | frequency\_penalty     | float       | value that controls the model's behavior with regards to generating rare phrases. Default is 0. | No       |
-| response_format        | object      | an object specifying the format that the model must output. Default is null.                   | No       |
 
 ## Outputs