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Rajesh Mishra
Rajesh Mishra

Posted on Originally published at howtostartprogramming.in

Fine-Tuning LLMs in 2026: A Practical LoRA & PEFT Tutorial

This is a summary of the full tutorial published on howtostartprogramming.in.

TL;DR What you’ll walk away with in under five minutes : Core concepts of LoRA (Low‑Rank Adaptation) and why it’s the go‑to PEFT (Parameter‑Efficient Fine‑Tuning) method in 2026. A step‑by‑step PEFT workflow from data prep to deployment. Ready‑to‑copy Python snippets (EnlighterJS‑highlighted) for model loading, LoRA injection, training, and inference. A quick‑reference table summarizing the most common hyper‑parameters and their typical ranges. Best‑practice tips for GPU/CPU budgeting, checkpointing, and serving LoRA‑tuned models. Stage Key Action Typical Settings (2026) Code Snippet Setup Install transformers , peft , torch Python ≥ 3.11, CUDA 12.4 pip install -U transformers peft torch Load Base Model Use AutoModelForCausalLM with device_map="auto" Model size: 7B‑40B, fp16/ bf16 from tra


📖 Read the Full Tutorial

🔗 Fine tuning LLMs practical guide LoRA PEFT tutorial 2026 — Full Guide with Code Examples

The full article includes:

  • ✅ Step-by-step code examples (copy-paste ready)
  • ✅ Complete working project (Spring Boot / Java)
  • ✅ Common mistakes + fixes
  • ✅ Production tips and benchmarks
  • ✅ FAQ section

Published on How to Start Programming — practical AI and Java tutorials for developers.

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