openai chat example

Former-commit-id: 95c933916a2c35a086eadcb1d565e618ecc1b1f0

README.md

@@ -81,6 +81,15 @@ Download via Github, and install requirements. Simple example by:
 
 * or create a new file:
 
+```python
+from swarms import OpenAI
+
+chat = OpenAI()
+response = chat("Hello world!")
+
+```
+
+
 ```python
 from swarms.swarms import HierarchicalSwarm