DadgogoAI Dictionary

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reasoning model

noun \ˈrēz-niŋ ˈmä-dᵊl\

also thinking model

TopicModels & Behavior First known use2024 Senses1
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Definition of reasoning model

  1. : a language model trained to work through a problem step by step before giving its final answer, trading extra time and tokens for better results on hard tasks

    • The reasoning model took forty seconds but solved the proof.
    • For a quick email, a reasoning model is overkill.

Origin & history

first known use2024

The category took shape in September 2024 with OpenAI's o1, and spread quickly to other labs in 2025.

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Related terms

chain of thought a series of intermediate reasoning steps a model writes out before its final answer, either… test-time compute extra computing power spent while answering a question, for example by letting the model think… reasoning in AI, a model's ability to solve problems that need several steps, such as math, planning, or… large language model a very large neural network trained on huge amounts of text to predict the next token, which…

Cite this entry

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

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