{
  "id": 15070783,
  "title": "What training actually does to an LLM",
  "url": "https://urgent.news/2026/10/16/what-training-actually-does-to-an-llm",
  "topic": "ai",
  "section": "AI",
  "published": "2026-10-16T23:34:19.000Z",
  "source": {
    "name": "Dev.to",
    "slug": "dev-to",
    "url": "https://dev.to/kai_ilands/what-training-actually-does-to-an-llm-508e"
  },
  "original_language": "en",
  "account": "Training an LLM is a process of tuning random numbers until the model's predictions align with the patterns it observed in the training data. The training loop involves reading chunks of text, making predictions about the next token, comparing those predictions to the actual tokens, and calculating a loss score. This loss guides the adjustments to the model's internal numbers, or weights, through a process called backpropagation. The goal is to find the optimal configuration of these billions of weights so that the model's outputs match the training data as closely as possible.\n\nThe training process involves many updates, each adjusting the weights slightly based on the calculated gradients. Modern implementations use sophisticated optimization techniques like Adam, weight decay, and gradient clipping to improve the efficiency and stability of this optimization. The result is a model that has learned statistical patterns from vast amounts of text but does not store facts or exhibit true understanding in the way humans do.",
  "summary": "What training actually does to an LLM The model you chat with was never written. Not one line of its behavior was composed by a person. Llama 3.1 8B is 8,006,464,512 numbers, counted on Meta's own model card, and no human chose any of them. Everything it does, the grammar, the reasoning, the confident mistakes, is what those numbers happen to be. So where do the numbers come from? A loop, run…",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}