diff --git a/sdk/ai/azopenai/custom_client.go b/sdk/ai/azopenai/custom_client.go
index 3a6a9ba70306..286bc171cedf 100644
--- a/sdk/ai/azopenai/custom_client.go
+++ b/sdk/ai/azopenai/custom_client.go
@@ -327,3 +327,8 @@ func NewChatRequestUserMessageContent[T string | []ChatCompletionRequestMessageC
 func (c ChatRequestUserMessageContent) MarshalJSON() ([]byte, error) {
 	return json.Marshal(c.value)
 }
+
+// UnmarshalJSON implements the json.Unmarshaller interface for type ChatRequestUserMessageContent.
+func (c *ChatRequestUserMessageContent) UnmarshalJSON(data []byte) error {
+	return json.Unmarshal(data, &c.value)
+}
diff --git a/sdk/ai/azopenai/custom_models.go b/sdk/ai/azopenai/custom_models.go
index 4c9bb7038fd5..4366965b39df 100644
--- a/sdk/ai/azopenai/custom_models.go
+++ b/sdk/ai/azopenai/custom_models.go
@@ -185,3 +185,8 @@ func (tf ChatCompletionsToolChoiceFunction) MarshalJSON() ([]byte, error) {
 func (tc ChatCompletionsToolChoice) MarshalJSON() ([]byte, error) {
 	return json.Marshal(tc.value)
 }
+
+// UnmarshalJSON implements the json.Unmarshaller interface for type ChatCompletionsToolChoice.
+func (tc *ChatCompletionsToolChoice) UnmarshalJSON(data []byte) error {
+	return json.Unmarshal(data, &tc.value)
+}