Reasoning summary – Definition & Meaning

Definition of reasoning summary

: a model-generated condensed account of the main steps or considerations used in reasoning, returned to a user or developer instead of the model's private raw chain of thought
- The API returned a reasoning summary explaining that the model compared the two plans on cost, latency, and reliability.
- Reviewers used the reasoning summary as a debugging aid but did not treat it as proof of every internal step the model had taken.

Two meanings, one word

In everyday English

A summary is a shortened account that presents the main points of something longer.

In AI

A model-generated condensed account of the main steps or considerations used in reasoning, returned to a user or developer instead of the model's private raw chain of…

Origin & history

first known use2025

OpenAI documented optional reasoning summaries for reasoning models in its Responses API by 2025. The term spread more broadly in 2026 as cloud platforms, model providers, and researchers described ways to expose useful explanations without revealing raw internal reasoning traces.

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Related terms

reasoning model a language model trained to work through a problem step by step before giving its final… chain of thought a series of intermediate reasoning steps a model writes out before its final answer, either… reasoning effort a model or API setting that influences how much internal reasoning or test-time computation an… test-time compute extra computing power spent while answering a question, for example by letting the model think… AI observability the practice of collecting and connecting traces, metrics, logs, evaluations, and other… chain-of-thought monitoring an AI safety technique that examines a reasoning model's written intermediate reasoning, often…

Cite this entry

"Reasoning summary." AI Dictionary, Dadgogo, https://dadgogo.com/dictionary/reasoning-summary/. Accessed 10 Oct. 2026.