diff --git a/README.md b/README.md
index 15692d92a..9fe36460c 100644
--- a/README.md
+++ b/README.md
@@ -45,6 +45,12 @@ git clone git@github.com:openchatai/OpenCopilot.git
 OPENAI_API_KEY=YOUR_TOKEN_HERE
 ```
 
+- gpt-4: Ideal for more complex tasks, but may have slower processing times.
+- gpt-3.5-turbo-16k: This model is significantly faster compared to GPT-4.
+```env
+PLAN_AND_EXECUTE_MODEL=gpt-3.5-turbo-16k
+```
+
 - After updating your API key, navigate to the repository folder and run the following command (for macOS or Linux):
 
 ```
diff --git a/llm-server/.env.example b/llm-server/.env.example
index 6d7816bcb..959d3706c 100644
--- a/llm-server/.env.example
+++ b/llm-server/.env.example
@@ -17,4 +17,5 @@ LANGCHAIN_PROJECT="PROJECT_NAME_GOES_HERE"
 
 # use gpt-4 for more complicated tasks, but it is usually much slower than 3.5-turbo family
 # gpt-3.5-turbo-16k - this model is many times faster than gpt-4, gpt-4 is more accurate with self observation
-PLAN_AND_EXECUTE_MODEL=gpt-3.5-turbo-16k
\ No newline at end of file
+PLAN_AND_EXECUTE_MODEL=gpt-3.5-turbo-16k
+VECTOR_DB_THRESHOLD=0.88
\ No newline at end of file