Language Model Builder is a free Mac application that provides both an interactive textbook and practical tools for building small language models. Users can train tokenizers, select training data, perform pre-training and fine-tuning, and then chat with the model they created. It is designed to demystify AI by letting non-experts and learners actively build and experiment with the core components of language models.
Language Model Builder sits in PulseGate's AI & ML category. It focuses on understanding how modern language models work by building a small version from scratch. It is built as a consumer product for students. Language Model Builder is free to use. It runs on the web and macOS.
Language Model Builder first shipped in 2025. Key capabilities include Tokenizer Training, pre-training, and fine-tuning.
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