chore(api): specification cleanup

Author: stainless-app[bot]

.stats.yml

@@ -1,4 +1,4 @@
 configured_endpoints: 97
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/openai%2Fopenai-2d116cda53321baa3479e628512def723207a81eb1cdaebb542bd0555e563bda.yml
-openapi_spec_hash: 809d958fec261a32004a4b026b718793
-config_hash: 5ef02e55671aae1ba9bd62fe4eb0f50f
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/openai%2Fopenai-de3e91790d0b9f3ce26d679ac07079880ccc695bd8c878f961c4d577a5025a2e.yml
+openapi_spec_hash: 4b44e3f287583d01fbe7b10cd943254a
+config_hash: 06b9a88561844d60d8efa4eaabf5fa3c

chatcompletion.go

@@ -1411,6 +1411,19 @@ func UserMessage[T string | []ChatCompletionContentPartUnionParam](content T) Ch
 	return ChatCompletionMessageParamUnion{OfUser: &user}
 }
 
+func ChatCompletionMessageParamOfAssistant[
+	T string | []ChatCompletionAssistantMessageParamContentArrayOfContentPartUnion,
+](content T) ChatCompletionMessageParamUnion {
+	var assistant ChatCompletionAssistantMessageParam
+	switch v := any(content).(type) {
+	case string:
+		assistant.Content.OfString = param.NewOpt(v)
+	case []ChatCompletionAssistantMessageParamContentArrayOfContentPartUnion:
+		assistant.Content.OfArrayOfContentParts = v
+	}
+	return ChatCompletionMessageParamUnion{OfAssistant: &assistant}
+}
+
 func ToolMessage[T string | []ChatCompletionContentPartTextParam](content T, toolCallID string) ChatCompletionMessageParamUnion {
 	var tool ChatCompletionToolMessageParam
 	switch v := any(content).(type) {