update readme

README.md

@@ -27,7 +27,7 @@ OpenAI, Anthropic, or LLaMA models). You can even evaluate the retrieval accurac
 
 ```python
 prompts = ["Tell me a joke.", "Is 17077 a prime number?"]
-models = ["gpt-3.5-turbo", "gpt-4"]
+models = ["gpt-3.5-turbo", "gp t-4"]
 temperatures = [0.0]
 openai_experiment = OpenAIChatExperiment(models, prompts, temperature=temperatures)
 openai_experiment.run()