diff --git a/src/gui.py b/src/gui.py
index a4bf86b..5e84df3 100644
--- a/src/gui.py
+++ b/src/gui.py
@@ -524,19 +524,26 @@ async def add_model():
     async def add_user_model(self, new_model):
         logger.debug(f"Adding user model: {new_model}")
         if new_model and new_model not in self.user_added_models:
-            self.user_added_models[new_model] = new_model
-            self.model_options = list(self.user_added_models.keys())
-            self.replicate_model_select.options = self.model_options
-            self.replicate_model_select.value = new_model
-            await self.update_replicate_model(new_model)
-            models_json = json.dumps(
-                {"user_added": list(self.user_added_models.keys())}
-            )
-            set_setting("default", "models", models_json)
-            save_settings()
-            ui.notify(f"Model '{new_model}' added successfully", type="positive")
-            self.model_list.refresh()
-            logger.info(f"User model added: {new_model}")
+            try:
+                latest_v = await asyncio.to_thread(
+                    self.image_generator.get_model_version, new_model
+                )
+                self.user_added_models[new_model] = latest_v
+                self.model_options = list(self.user_added_models.values())
+                self.replicate_model_select.options = self.model_options
+                self.replicate_model_select.value = latest_v
+                await self.update_replicate_model(latest_v)
+                models_json = json.dumps(
+                    {"user_added": list(self.user_added_models.values())}
+                )
+                set_setting("default", "models", models_json)
+                save_settings()
+                ui.notify(f"Model '{latest_v}' added successfully", type="positive")
+                self.model_list.refresh()
+                logger.info(f"User model added: {latest_v}")
+            except Exception as e:
+                logger.error(f"Error adding model: {str(e)}")
+                ui.notify(f"Error adding model: {str(e)}", type="negative")
         else:
             logger.warning(f"Invalid model name or model already exists: {new_model}")
             ui.notify("Invalid model name or model already exists", type="negative")
diff --git a/src/replicate_api.py b/src/replicate_api.py
index 0aaf4cf..cafd3e0 100644
--- a/src/replicate_api.py
+++ b/src/replicate_api.py
@@ -12,17 +12,46 @@ class ImageGenerator:
     def __init__(self):
         self.replicate_model = None
         self.api_key = None
+        self.client = None
         logger.info("ImageGenerator initialized")
 
     def set_api_key(self, api_key):
         self.api_key = api_key
         os.environ["REPLICATE_API_KEY"] = api_key
-        logger.info("API key set")
+        self.client = replicate.Client(api_token=self.api_key)
+        logger.info("API key set and client initialized")
 
     def set_model(self, replicate_model):
         self.replicate_model = replicate_model
         logger.info(f"Model set to: {replicate_model}")
 
+    def get_model_version(self, user_input):
+        if not self.client:
+            error_message = (
+                "No API key set. Please set an API key before getting model version."
+            )
+            logger.error(error_message)
+            raise ImageGenerationError(error_message)
+
+        logger.info(f"Parsing model string: {user_input}")
+        if ":" in user_input:
+            logger.debug("Model string contains version")
+            return user_input
+        else:
+            logger.debug("Model string does not contain version")
+            owner, name = user_input.split("/")
+            logger.debug(f"Retrieving latest version for {owner}/{name}")
+            if not self.client:
+                error_message = "No API key set. Please set an API key before getting model version."
+                logger.error(error_message)
+                raise ImageGenerationError(error_message)
+
+            model = self.client.models.get(f"{owner}/{name}")
+            version = model.latest_version.id
+            latest_version = f"{owner}/{name}:{version}"
+            logger.info(f"Latest version retrieved: {latest_version}")
+            return latest_version
+
     def generate_images(self, params):
         if not self.replicate_model:
             error_message = (
@@ -31,7 +60,7 @@ def generate_images(self, params):
             logger.error(error_message)
             raise ImageGenerationError(error_message)
 
-        if not self.api_key:
+        if not self.client:
             error_message = (
                 "No API key set. Please set an API key before generating images."
             )
@@ -40,17 +69,13 @@ def generate_images(self, params):
 
         try:
             flux_model = params.pop("flux_model", "dev")
-
             params["model"] = flux_model
-
             logger.info(
                 f"Generating images with params: {json.dumps(params, indent=2)}"
             )
             logger.info(f"Using Replicate model: {self.replicate_model}")
 
-            client = replicate.Client(api_token=self.api_key)
-            output = client.run(self.replicate_model, input=params)
-
+            output = self.client.run(self.replicate_model, input=params)
             logger.success(f"Images generated successfully. Output: {output}")
             return output
         except Exception as e: