diff --git a/README.md b/README.md
index 30bddc6..6460655 100644
--- a/README.md
+++ b/README.md
@@ -76,6 +76,7 @@ The configuration is described in this [doc](https://icystudio.github.io/TeleGPT
 ```json
 {
   "openaiAPIKey": "sk-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
+  "openaiGptModel": "gpt-3.5-turbo",
   "botToken": "8888888888:XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX",
   "adminUsernames": ["cyandev"],
   "conversationLimit": 30,
diff --git a/config.example.json b/config.example.json
index 4662d05..8e207f8 100644
--- a/config.example.json
+++ b/config.example.json
@@ -1,5 +1,6 @@
 {
     "openaiAPIKey": "sk-************************************************",
+    "openaiGptModel": "gpt-3.5-turbo",
     "botToken": "8888888888:***********************************",
     "conversationLimit": 16,
     "databasePath": "/telegpt/data/telegpt.sqlite",
@@ -10,4 +11,4 @@
     "i18n": {
         "resetPrompt": "Your conversation has been reset."
     }
-}
\ No newline at end of file
+}
diff --git a/src/config.rs b/src/config.rs
index 4d663cf..badae5c 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -61,6 +61,12 @@ pub struct Config {
     #[serde(rename = "botToken")]
     pub telegram_bot_token: String,
 
+    /// The openai model your want to use in chat.
+    /// Value is default to "gpt-3.5-turbo".
+    /// JSON key: `openaiGptModel`
+    #[serde(default = "default_openai_gpt_model", rename = "openaiGptModel")]
+    pub openai_gpt_model: String,
+
     /// A timeout in seconds for waiting for the OpenAI server response.
     /// JSON key: `openaiAPITimeout`
     #[serde(default = "default_openai_api_timeout", rename = "openaiAPITimeout")]
@@ -155,6 +161,7 @@ define_defaults! {
     stream_throttle_interval: u64 = 500,
     conversation_limit: u64 = 20,
     renders_markdown: bool = false,
+    openai_gpt_model: String = "gpt-3.5-turbo".to_owned(),
 }
 
 define_defaults!(I18nStrings {
diff --git a/src/modules/openai.rs b/src/modules/openai.rs
index 43c1b0c..1618ca6 100644
--- a/src/modules/openai.rs
+++ b/src/modules/openai.rs
@@ -30,7 +30,7 @@ impl OpenAIClient {
     ) -> Result<ChatModelStream, Error> {
         let client = &self.client;
         let req = CreateChatCompletionRequestArgs::default()
-            .model("gpt-3.5-turbo")
+            .model(self.config.openai_gpt_model.clone())
             .temperature(0.6)
             .max_tokens(self.config.max_tokens.unwrap_or(4096))
             .messages(msgs)