DadgogoAI Dictionary

Dictionary entry

base model

noun \ˈbās ˈmä-dᵊl\

also pretrained model

TopicModels & Behavior Senses1
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Definition of base model

  1. : a language model that has only been pre-trained, not yet tuned to follow instructions or chat; it continues text rather than answering questions

    • Ask a base model a question and it may just write more questions.
    • Researchers like base models because their behavior hasn't been shaped by fine-tuning.

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Related terms

pre-training the first and most expensive stage of building a model, in which it learns general patterns… instruction tuning fine-tuning a base model on examples of instructions paired with good responses, so it learns… foundation model a large model trained on broad data that can be adapted to many different tasks, serving as…

Cite this entry

"Base model." AI Dictionary, Dadgogo, https://dadgogo.com/dictionary/base-model/. Accessed 4 Oct. 2026.

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