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Course contents

  • Getting Started with AI for VLSI Engineers5
  • Just Enough AI: Models and Context15
    • What a Language Model Does
      • Next-Token Prediction and the Sampling Loop
      • Training and Inference
      • Parameters at an Intuitive Level
      • Fluency, Correctness and Knowledge Cutoff
      • Temperature and Sampling
    • Tokens and Tokenization
    • Context Window and Attention for Users
  • Prompting13
  • Trust and Verification14
  • Using AI for Engineering Work17
  • Engineering Walkthroughs7
  • Practical Foundations for AI Workflows4
  • Engineering Data5
  • Retrieval-Augmented Generation6
  • Agents and Tool Use18
  • Agent Design8
  • MCP and Skills6
  • Multi-Agent Design6
  • Practical Capstone6
  • Tokens, Cost and Latency12
  • Agentic Workflows for Chip Teams18
  • Interview and Judgment10
  • AI Skills: Full Course Index
  • Working with AI Glossary
  • Working with AI Cheatsheet
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‹Just Enough AI: Models and Context
  1. Topics
  2. AI Skills for VLSI Engineers
  3. Just Enough AI: Models and Context
  4. What a Language Model Does

Just Enough AI · Beginner to Intermediate

What a Language Model Does

Prediction, training, parameters, fluency limits, cutoffs and sampling explained.

  • 5topics
  • 5lessons

A language model maps input text to a distribution over next tokens and samples one token at a time. This topic follows that mechanism from training through sampling.

Loop from prompt text to scores to a sampled token appended back to the input.
Each step scores candidate next tokens, samples one, appends it, and repeats.

Term

Meaning

Next-token prediction

Scoring each vocabulary item as a possible continuation of the text so far.

Training

Setting the model numbers from a large text collection before use.

Inference

Running the fixed model on a new prompt to score and sample tokens.

Parameters

The stored numbers set by training and read at inference.

Temperature

A sampling control that sharpens or flattens the next-token distribution.

Knowledge cutoff

The point where the training collection ends, after which events are unknown.

Lesson

What it covers

Next-token prediction

The scoring step and the loop that builds text token by token.

Training and inference

What training sets, what inference reuses, and what differs in practice.

Parameters

Stored numbers at an intuitive level, with EXAMPLE storage arithmetic.

Fluency and cutoff

Why fluent text can be wrong and how cutoffs limit freshness.

Temperature and sampling

Temperature scaling with a runnable fixed-table sampling model.

Check yourself The same prompt returns two different answers on two runs. Which part of the loop explains that?

Sampling explains it. Scores may be similar, but each run draws a different token at some step and the continuations diverge.

Interview

Carry one sentence per lesson: text is built one sampled token at a time, training sets numbers that inference reads, parameters are stored numbers, fluency is not correctness, and temperature reshapes the sampling distribution.

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See also

  • Tokens and Tokenization
  • Context Window and Attention for Users