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Inspired by Andrej Karpathy’s “Let’s build the GPT Tokenizer video”., this post walks through implementing Byte-Pair Encoding (BPE) in Go. As a Go learner, I’ve translated the Python algorithm to Go, exploring both BPE and Go programming in the process. What is Encoding and Why Do We Need It? Before we dive into BPE, let’s talk about encoding in general. Encoding is how we represent text in a way that computers can understand....