Unraveling the Three Crucial Phases of Language Model Training



LLM Phases Description
Pretraining
Pretraining is the initial phase of training an LLM (Language Model). In this stage, the model learns from a large corpus of text data. It learns to predict the next word in a sentence, which helps it understand the syntax, semantics, and context of language. This process involves adjusting the weights of the model's parameters to minimize the difference between its predictions and the actual results.
Fine-tuning
Fine-tuning is the second phase in training an LLM. After pretraining, the model is further trained on a smaller, specific dataset to adapt it to specific tasks or domains. For instance, if the model is to be used for legal documents, it is fine-tuned on a corpus of legal texts. This helps the model to understand and generate text that is specifically relevant to the intended task.
Inference
Inference is the final phase where the trained model is used for prediction. The model takes in a sequence of words as input and outputs a generated sequence of words. For instance, in a conversation AI, the model takes in a prompt from the user and generates a reply. This is the phase where the model's understanding of language, acquired through pretraining and fine-tuning, is applied to practical use.



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