Update README.md

README.md

@@ -3693,6 +3693,10 @@ The `GME` models support three types of input: **text**, **image**, and **image-
 
 ## Usage 
 **Use with sentence_transformers**
+The `encode` function accept `str` or `dict` with key(s) in `{'text', 'image', 'prompt'}`.
+
+**Do not pass `prompt` as the argument to `encode`**, pass as the input as a `dict` with a `prompt` key.
+
 ```python
 from sentence_transformers import SentenceTransformer