Update README.md

README.md

@@ -4,7 +4,7 @@ emoji: 📘
 colorFrom: indigo
 colorTo: blue
 sdk: gradio
-sdk_version: "4.42.0"
+sdk_version: 5.44.1
 app_file: app.py
 pinned: false
 ---
@@ -22,3 +22,17 @@ This Space uses:
 
 1. Go to your Space’s **Settings → Repository secrets**.
 2. Add your Groq API key as:
+GROQ_API_KEY = your_api_key_here
+
+## 🚀 Usage
+
+1. Upload a PDF paper.
+2. Ask questions in the chatbox.
+3. The system retrieves relevant chunks from the PDF and asks Groq’s LLM to explain in simple terms.
+
+## 🧩 Models
+- Embeddings: `intfloat/e5-base-v2`
+- Vector DB: FAISS
+- LLM (via Groq API): `qwen/qwen3-32b` (default, can be swapped for `llama3-70b`)
+
+---