fix: only set completion response format when api is openai (#213)

closes #206

Signed-off-by: Carlos Alexandro Becker <caarlos0@users.noreply.github.com>

mods.go

@@ -393,15 +393,13 @@ func (m *Mods) startCompletionCmd(content string) tea.Cmd {
 		stream, err := client.CreateChatCompletionStream(
 			ctx,
 			openai.ChatCompletionRequest{
-				Model:       mod.Name,
-				Temperature: noOmitFloat(cfg.Temperature),
-				TopP:        noOmitFloat(cfg.TopP),
-				MaxTokens:   cfg.MaxTokens,
-				Messages:    m.messages,
-				Stream:      true,
-				ResponseFormat: &openai.ChatCompletionResponseFormat{
-					Type: responseType(cfg),
-				},
+				Model:          mod.Name,
+				Temperature:    noOmitFloat(cfg.Temperature),
+				TopP:           noOmitFloat(cfg.TopP),
+				MaxTokens:      cfg.MaxTokens,
+				Messages:       m.messages,
+				Stream:         true,
+				ResponseFormat: responseFormat(cfg),
 			},
 		)
 		ae := &openai.APIError{}
@@ -623,6 +621,16 @@ func removeWhitespace(s string) string {
 	return s
 }
 
+func responseFormat(cfg *Config) *openai.ChatCompletionResponseFormat {
+	if cfg.API != "openai" {
+		// only openai's api supports ChatCompletionResponseFormat
+		return nil
+	}
+	return &openai.ChatCompletionResponseFormat{
+		Type: responseType(cfg),
+	}
+}
+
 func responseType(cfg *Config) openai.ChatCompletionResponseFormatType {
 	if !cfg.Format {
 		return openai.ChatCompletionResponseFormatTypeText