diff --git a/.stats.yml b/.stats.yml
index 140d244..e9032de 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,2 +1,2 @@
 configured_endpoints: 76
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/openai-be834d63e326a82494e819085137f5eb15866f3fc787db1f3afe7168d419e18a.yml
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/openai-9ce5257763fb30c6e0e1ee2bef7e13baf661511e09572207e528d643da8e16b3.yml
diff --git a/chatcompletion.go b/chatcompletion.go
index 3a389c7..eb44e69 100644
--- a/chatcompletion.go
+++ b/chatcompletion.go
@@ -2200,7 +2200,7 @@ func (r ChatCompletionNewParams) MarshalJSON() (data []byte, err error) {
 // `none` is the default when no functions are present. `auto` is the default if
 // functions are present.
 //
-// Satisfied by [ChatCompletionNewParamsFunctionCallString],
+// Satisfied by [ChatCompletionNewParamsFunctionCallFunctionCallMode],
 // [ChatCompletionFunctionCallOptionParam].
 //
 // Deprecated: deprecated
@@ -2211,22 +2211,22 @@ type ChatCompletionNewParamsFunctionCallUnion interface {
 // `none` means the model will not call a function and instead generates a message.
 // `auto` means the model can pick between generating a message or calling a
 // function.
-type ChatCompletionNewParamsFunctionCallString string
+type ChatCompletionNewParamsFunctionCallFunctionCallMode string
 
 const (
-	ChatCompletionNewParamsFunctionCallStringNone ChatCompletionNewParamsFunctionCallString = "none"
-	ChatCompletionNewParamsFunctionCallStringAuto ChatCompletionNewParamsFunctionCallString = "auto"
+	ChatCompletionNewParamsFunctionCallFunctionCallModeNone ChatCompletionNewParamsFunctionCallFunctionCallMode = "none"
+	ChatCompletionNewParamsFunctionCallFunctionCallModeAuto ChatCompletionNewParamsFunctionCallFunctionCallMode = "auto"
 )
 
-func (r ChatCompletionNewParamsFunctionCallString) IsKnown() bool {
+func (r ChatCompletionNewParamsFunctionCallFunctionCallMode) IsKnown() bool {
 	switch r {
-	case ChatCompletionNewParamsFunctionCallStringNone, ChatCompletionNewParamsFunctionCallStringAuto:
+	case ChatCompletionNewParamsFunctionCallFunctionCallModeNone, ChatCompletionNewParamsFunctionCallFunctionCallModeAuto:
 		return true
 	}
 	return false
 }
 
-func (r ChatCompletionNewParamsFunctionCallString) implementsChatCompletionNewParamsFunctionCallUnion() {
+func (r ChatCompletionNewParamsFunctionCallFunctionCallMode) implementsChatCompletionNewParamsFunctionCallUnion() {
 }
 
 // Deprecated: deprecated
diff --git a/chatcompletion_test.go b/chatcompletion_test.go
index effbedf..fa9a191 100644
--- a/chatcompletion_test.go
+++ b/chatcompletion_test.go
@@ -38,7 +38,7 @@ func TestChatCompletionNewWithOptionalParams(t *testing.T) {
 			Voice:  openai.F(openai.ChatCompletionAudioParamVoiceAlloy),
 		}),
 		FrequencyPenalty: openai.F(-2.000000),
-		FunctionCall:     openai.F[openai.ChatCompletionNewParamsFunctionCallUnion](openai.ChatCompletionNewParamsFunctionCallString(openai.ChatCompletionNewParamsFunctionCallStringNone)),
+		FunctionCall:     openai.F[openai.ChatCompletionNewParamsFunctionCallUnion](openai.ChatCompletionNewParamsFunctionCallFunctionCallMode(openai.ChatCompletionNewParamsFunctionCallFunctionCallModeNone)),
 		Functions: openai.F([]openai.ChatCompletionNewParamsFunction{{
 			Name:        openai.F("name"),
 			Description: openai.F("description"),