Update README.md

README.md

@@ -115,6 +115,9 @@ text = tokenizer.batch_decode(outputs)[0]
 print(text)
 ```
 
+**Remark.** In the generation function, our model currently does not support beam search (`num_beams` >1) and `attention_mask' parameters. 
+Furthermore, in the forward pass of the model, we currently do not support outputing hidden states or attention values, using custom input embeddings (instead of the model's).
+
 ### Citation
 ```bib
 @article{textbooks2,