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Build an LLM from scratch
Build and Train a Mixture-of-Experts (MoE) LLM from Scratch
An end-to-end guide to training an Mixture-of-Experts (MoE) LLM from scratch.
Mar 20
•
Dr. Ashish Bamania
11
1
Build Grouped Query Attention (GQA) From Scratch
Learn to implement Grouped Query Attention (GQA) from scratch, the de facto standard for modern LLMs like Llama, Mistral, GPT-OSS, and Qwen.
Feb 13
•
Dr. Ashish Bamania
4
1
Build Multi-Query Attention (MQA) From Scratch
AI Engineering Essentials: Learn to implement Multi-Query Attention (MQA) used in LLMs like PaLM and Falcon from scratch
Jan 22
•
Dr. Ashish Bamania
8
3
Build a Mixture-of-Experts (MoE) Transformer from Scratch
Learn to build the Mixture-of-Experts (MoE) Transformer, the core architecture that powers LLMs like gpt-oss, Grok, and Mixtral, from scratch in…
Jan 15
•
Dr. Ashish Bamania
9
2
2
Build a Mixture-of-Experts (MoE) Layer from Scratch
Learn to build the Mixture-of-Experts (MoE) layer that powers LLMs like gpt-oss, Grok and Mistral from scratch in PyTorch.
Jan 10
•
Dr. Ashish Bamania
8
4
Build and train an LLM from Scratch
An end-to-end guide to training an LLM from scratch to generate text.
Dec 31, 2025
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Dr. Ashish Bamania
21
12
Build an LLM Tokenizer From Scratch
Learn to implement the Tokenizer of a GPT-like LLM in PyTorch from scratch.
Dec 23, 2025
•
Dr. Ashish Bamania
10
3
Build a Decoder-only Transformer from Scratch
Build a Decoder-Only Transformer, the core architecture powering GPT-like LLMs from scratch in PyTorch.
Dec 18, 2025
•
Dr. Ashish Bamania
16
2
13
Build Causal Multi-Head Self-Attention From Scratch
#6: AI/ ML Engineering Interview Essentials: Causal Multi-head Self-Attention
Dec 14, 2025
•
Dr. Ashish Bamania
6
2
2
Build Multi-Head Self-Attention From Scratch
ML Interview Essentials: Multi-head Self-Attention
Nov 25, 2025
•
Dr. Ashish Bamania
7
3
Build Self-Attention From Scratch
#1. Self-Attention (5 minutes read)
Nov 2, 2025
•
Dr. Ashish Bamania
9
2
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