03 Create a Free Chat GPT-like application (RAG-based AI app) using Azure Services - Details Design

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03 Create a Chat GPT-like application (RAG-based AI app) using Azure Services

🧠 🆓 1. Free Version Architecture

🛠️ 2. Replace Azure Paid Services with Free Options

Here’s the exact mapping:

Azure Service

Free Alternative

Azure OpenAI

Ollama (run models locally)

Azure AI Search

FAISS / Chroma (open-source vector DB)

Azure Functions

FastAPI (free backend)

Azure Static Web Apps

Vercel / Netlify

Cosmos DB

SQLite / free MongoDB Atlas tier

Blob Storage

Local files / Google Drive

🧩 3. 100% Free Setup (Best Option)

🔹 Option A: Run Everything Locally (FREE)

Stack:

  • LLM → Ollama (LLaMA, Mistral)
  • Backend → FastAPI
  • Vector DB → Chroma / FAISS
  • UI → Simple React or Streamlit

Cost: $0

👉 You already tried Ollama earlier — this is perfect for you.

🔹 Option B: Free Cloud + Local Hybrid

  • UI → Vercel (free)
  • Backend → Render / Railway (free tier)
  • LLM → Ollama (local) OR free APIs
  • DB → MongoDB Atlas (free)

Cost: ~$0

🔹 Option C: Azure Free Tier (Limited)

Using Microsoft Azure:

  • Free credits (~$200 for new users)
  • Free tier services:
    • Static Web Apps (free)
    • Functions (limited free)
    • Storage (limited)

⚠️ BUT:

  • ❌ Azure OpenAI is NOT free long-term
  • ❌ AI Search is NOT free

🤖 4. Free LLM Options (Important)

🧠 Run locally (best free option)

  • LLaMA 3 (via Ollama)
  • Mistral
  • Gemma

🌐 Free APIs (limited)

  • Hugging Face (free inference tier)
  • Groq (fast + some free usage)

⚠️ 5. Reality Check (Important)

Feature

Free Possible?

Basic chatbot

✅ Yes

RAG (your docs)

✅ Yes

Production scale

❌ No

GPT-4 quality

❌ Not fully

💡 6. Smart Strategy (What I Recommend)

Start FREE → then scale:

Step 1 (Free)

  • Ollama + FastAPI + React
  • Learn architecture

Step 2 (Low cost ~$10–$50)

  • Switch to OpenAI API

Step 3 (Scale)

  • Move to Azure

🚀 7. Easiest Free Setup (Do This)

If you want fastest success, do this:

  1. Install Ollama
  2. Run:

ollama run llama3

  1. Use:
    • Python + FastAPI
    • Chroma DB
  2. Optional UI:
    • Streamlit (super easy)

🧠 Final Insight

👉 “Free” is best for:

  • Learning
  • Prototyping
  • Small personal apps

👉 “Paid” is needed for:

  • Scale
  • Reliability
  • Better AI quality

 

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