What Happens Inside LLM After You Hit Enter? LLM Explained Step-by-Step (You’ll Never Forget This)

Have you ever wondered what actually happens inside an AI model like ChatGPT when you ask a question?

When you type something like:

“The capital of Germany is…”

The AI doesn't search Google or look up a database. Instead, an incredible sequence of mathematical operations happens inside the model.

In this video, we walk step-by-step through the exact process a Large Language Model (LLM) uses to generate an answer.

You will see how your sentence moves through:

Tokenization → Embeddings → Transformer Layers → Logits → Softmax → Final Token Prediction

By the end of this video, you'll clearly understand how AI converts a question into an answer like "Berlin".

If you're starting your AI journey, this video will help you build a strong mental model of how modern language models work.

What You’ll Learn in This Video
• How AI breaks sentences into tokens
• How words become vectors (embeddings)
• How transformer layers process language
• How models compute logits for every word in the vocabulary
• How Softmax converts scores into probabilities
• How the final token is selected

Key Concepts Explained:
Tokenization
Token IDs
Word Embeddings
High Dimensional Vectors
Self Attention (Q, K, V)
Transformer Architecture
Feed Forward Networks
Hidden Representations
Logits
Softmax Function
Token Prediction
Next Token Generation

Detailed Videos for Each Concept
If you want a deeper understanding, watch the detailed videos below:
Tokenization Explained 👉 https://www.youtube.com/watch?v=X9XCBQ-00hc
Embeddings Explained 👉 https://www.youtube.com/watch?v=X9XCBQ-00hc
Self Attention (Q, K, V) Explained 👉 https://www.youtube.com/watch?v=JI5evZnmsQs&t=12s
Transformer Architecture Explained 👉https://www.youtube.com/watch?v=WFKD2oi3sg4
Logits and Unembedding Explained 👉Planned
Softmax Explained 👉 Planned
How LLMs Generate Text Token by Token 👉 Planned

AI for Beginners Series: This video is part of the AI for Beginners course, where we break down complex AI concepts in simple visuals. Start the full course here 👉 https://yourchannel.com/ai-for-beginners If You Enjoyed This Video 👍 Like the video 📌 Subscribe for more AI explained simply 🔁 Share with friends who want to learn AI

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