diff --git a/ai.go b/ai_gemini.go
similarity index 97%
rename from ai.go
rename to ai_gemini.go
index 396db6d..1132bc8 100644
--- a/ai.go
+++ b/ai_gemini.go
@@ -37,7 +37,7 @@ type Data struct {
 	Contents []Content `json:"contents"`
 }
 
-func askAI(userID int64) string {
+func askGemini(userID int64) string {
 	var data Data
 	chats := getChats(userID)
 	if len(chats) > 0 {
diff --git a/ai_openai.go b/ai_openai.go
new file mode 100644
index 0000000..f66a84f
--- /dev/null
+++ b/ai_openai.go
@@ -0,0 +1,92 @@
+package main
+
+import (
+	"bytes"
+	"encoding/json"
+	log "github.com/sirupsen/logrus"
+	"io"
+	"net/http"
+)
+
+type ChatMessage struct {
+	Role    string `json:"role"`
+	Content string `json:"content"`
+}
+
+type ChatRequest struct {
+	Model    string        `json:"model"`
+	Messages []ChatMessage `json:"messages"`
+}
+
+type ChatResponse struct {
+	Choices []struct {
+		Message struct {
+			Content string `json:"content"`
+		} `json:"message"`
+	} `json:"choices"`
+}
+
+func mapRole(originalRole string) string {
+	switch originalRole {
+	case "USER":
+		return "user"
+	case "MODEL":
+		return "assistant"
+	default:
+		return "user"
+	}
+}
+
+const openAI = "https://gptmos.com/v1/chat/completions"
+
+func askOpenAI(userID int64) string {
+	var chatReq ChatRequest
+	chats := getChats(userID)
+	if len(chats) > 0 {
+		for _, chat := range chats {
+			chatReq.Messages = append(chatReq.Messages, ChatMessage{
+				Role:    mapRole(chat.Role),
+				Content: chat.Text,
+			})
+		}
+	}
+
+	chatReq.Model = "gpt-4-0125-preview"
+
+	jsonData, err := json.Marshal(chatReq)
+	if err != nil {
+		log.Errorf("Failed to marshal request: %v", err)
+		return err.Error()
+	}
+	log.Infoln(string(jsonData))
+
+	// Replace with the actual URL and add authorization headers as needed
+	req, _ := http.NewRequest("POST", openAI, bytes.NewBuffer(jsonData))
+	req.Header.Set("Authorization", "Bearer "+OpenAIKey)
+	client := &http.Client{}
+	resp, err := client.Do(req)
+	if err != nil {
+		log.Errorf("Failed to make request: %v", err)
+		return err.Error()
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		body, _ := io.ReadAll(resp.Body)
+		text := string(body)
+		log.Errorf("Request failed, %s", text)
+		return text
+	}
+
+	var chatResp ChatResponse
+	if err := json.NewDecoder(resp.Body).Decode(&chatResp); err != nil {
+		log.Errorf("Failed to decode response: %v", err)
+		return err.Error()
+	}
+
+	if len(chatResp.Choices) > 0 && len(chatResp.Choices[0].Message.Content) > 0 {
+		return chatResp.Choices[0].Message.Content
+	}
+
+	return "no response found"
+}
diff --git a/config.go b/config.go
index f48ddc8..6f2f037 100644
--- a/config.go
+++ b/config.go
@@ -53,7 +53,7 @@ const (
 
 var apiKey = os.Getenv("GEMINI_API_KEY")
 var geminiURL = "https://generativelanguage.googleapis.com/v1beta/models/gemini-pro:generateContent?key=" + apiKey
-
+var OpenAIKey = os.Getenv("OPENAI_API_KEY")
 var (
 	selector = &tb.ReplyMarkup{}
 	btnPrev  = selector.Data("Ask AI", "ai-init", "1")
diff --git a/handler.go b/handler.go
index d790f53..71b4359 100644
--- a/handler.go
+++ b/handler.go
@@ -56,7 +56,7 @@ func mainEntrance(c tb.Context) error {
 		} else {
 			addChat(c.Sender().ID, userRole, c.Message().Text)
 		}
-		aiResponse := askAI(c.Sender().ID)
+		aiResponse := askGemini(c.Sender().ID)
 		addChat(c.Sender().ID, modelRole, aiResponse)
 		return c.Send(aiResponse, tb.NoPreview)
 	} else {
@@ -84,7 +84,7 @@ func testEntrance(c tb.Context) error {
 		} else {
 			addChat(c.Sender().ID, userRole, c.Message().Text)
 		}
-		aiResponse := askAI(c.Sender().ID)
+		aiResponse := askGemini(c.Sender().ID)
 		addChat(c.Sender().ID, modelRole, aiResponse)
 		return c.Send(aiResponse, tb.NoPreview)
 	} else {