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reasoning model

noun \ˈrēz-niŋ ˈmä-dᵊl\

also thinking model

TopicModels & Behavior First known use2024 Senses1

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.
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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… long-horizon model an AI model designed to work autonomously on a goal through many steps and repeated attempts… adversarial distillation the systematic, unauthorized use of a capable AI model's outputs or reasoning traces to train… on-policy distillation a form of model distillation in which the student generates its own outputs or trajectories… autoformalization the automatic translation of mathematical statements, definitions, or proofs written in… reasoning effort a model or API setting that influences how much internal reasoning or test-time computation an… reasoning economy the study and optimization of how an AI system allocates tokens, computation, time, and money… chain-of-thought monitoring an AI safety technique that examines a reasoning model's written intermediate reasoning, often… mathocalypse an anticipated or perceived upheaval in mathematics caused by AI systems producing new proofs… reasoning summary a model-generated condensed account of the main steps or considerations used in reasoning… proof abundance a condition in which AI systems can produce mathematical proofs or credible proof attempts… preserved thinking the retention and reuse of a model's earlier reasoning blocks across later turns or tool… reinforcement learning with verifiable rewards a post-training method in which a model learns through reinforcement learning from rewards… process reward model a reward model that scores individual steps or intermediate states in a model's reasoning… visual chain-of-thought a multimodal AI reasoning method that uses visual information or intermediate visual…

Cite this entry

"Reasoning model." AI Dictionary, Dadgogo, https://dadgogo.com/dictionary/reasoning-model/. Accessed 24 Oct. 2026.

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