Update readme with dev model description

README.md

@@ -37,19 +37,27 @@ like [Numpy](https://numpy.org) and [Pillow](https://pypi.org/project/pillow/) f
    ```
 ### Generating an image
 
-Run the provided [main.py](main.py) by specifying a prompt and some optional arguments like so:
+Run the provided [main.py](main.py) by specifying a prompt and some optional arguments like so using the default `Schnell` model:
 
 ```
 python main.py --prompt "Luxury food photograph" --steps 2 --seed 2
 ```
 
+or use the slower, but more powerful `Dev` model and run it with more time steps:
+
+```
+python main.py --model dev --prompt "Luxury food photograph" --steps 25 --seed 2
+```
+
+⚠️ *If the specific model is not already downloaded on your machine, it will start the download process and fetch the model weights (~34GB in size for the Schnell or Dev model respectively).* ⚠️
+
 #### Full list of Command-Line Arguments 
 
 - **`--prompt`** (required, `str`): Text description of the image to generate.
 
 - **`--output`** (optional, `str`, default: `"image.png"`): Output image filename.
 
-- **`--model`** (optional, `str`, default: `"schnell"`): Model to use for generation.
+- **`--model`** (optional, `str`, default: `"schnell"`): Model to use for generation (`"schnell"` or `"dev"`).
 
 - **`--seed`** (optional, `int`, default: `0`): Seed for random number generation. Default is time-based.
 
@@ -85,8 +93,6 @@ image = flux.generate_image(
 ImageUtil.save_image(image, "image.png")
 ```
 
-If the model is not already downloaded on your machine, it will start the download process and fetch the model weights (~34GB in size for the Schnell model).
-
 
 ### Image generation speed (updated)