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Cross-Entropy Loss

Standard loss function for classification: L = -Σ y_i log(p_i). Measures difference between predicted probability distribution and true distribution. Used in language modeling (next-token prediction).

Where this is taught

• Information Theory — Phase 3: Advanced Math for AI
• Probability and Distributions — Phase 2: Probability & Statistics
• Logistic Regression — Phase 1: Classification Algorithms
• Pre-Training a Mini GPT (124M Parameters) — Phase 3: LLM Architecture
• Classification & Logistic Regression — Phase 2: Classical Machine Learning

Related terms

Softmax

More in Math

Softmax · Cosine Similarity · Perplexity

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