"--model" now option and not argument

gpt_engineer/applications/cli/main.py

@@ -249,7 +249,7 @@ def prompt_yesno() -> bool:
 )
 def main(
     project_path: str = typer.Argument(".", help="path"),
-    model: str = typer.Argument("gpt-4o", help="model id string"),
+    model: str = typer.Option("gpt-4o", "--model", "-m", help="model id string"),
     temperature: float = typer.Option(
         0.1,
         "--temperature",