🛡️ Hybrid Chat + Email Spam Classifier (Encoder-Only, Multi-Turn)

This repository provides a lightweight, encoder-only multi-turn classifier designed to detect spam and unwanted content across emails and chat conversations.

It supports short and long messages, as well as multi-turn conversational inputs (meta data + message)

It was trained using a mixed dataset emails, support chats, and messaging threads, using a 14B Teacher Model.

This model is a fast-encoder only model, trained from distillation with a 14B Teacher Model on a 20M records dataset.

✨ Features

• Encoder-only architecture → gives scores
• Multi-turn support → handles conversation history and context windows
• Hybrid input domain → optimized for both chat messages & email bodies
• High-throughput → suitable for millions of messages/day
• Ideal for security filters (spam, scams, phishing, self-promotion content)
• Open-source and deployable anywhere (CPU or GPU)

🔧 Model Architecture

• Type: Encoder-only (XLM Roberta Large)

• Input format:

[CONTEXT 1] [CONTEXT 2] ... [USER MESSAGE]

Labels include:

• spam
• regular (ham)
• marketing
• gibberish

Benchmark

• F1 Spam: 0.90
• F1 Regular: 0.95
• F1 Marketing: 0.87
• F1 Gibberish: 0.94

While this model is not perfect, it is excellent at quickly catching spam and is way better than bayesian filters.