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Glossary · term151 of 202

reasoning trace

The intermediate chain-of-thought text a reasoning model produces while working toward an answer, kept separate from the final response it returns. Instructions aimed at the trace are followed far less reliably than instructions aimed at the response.

also written as reasoning traces

Related terms
execution subagentA subagent given a narrow task with a fixed output shape and a written boundary, as opposed to open-ended reasoning or planning work. Its job is to follow the spec, not to expand scope.view term->instruction-following scoreA measured rate of how often a model actually obeys a stated instruction, split by whether the instruction shows up inside its reasoning trace or only in the final answer.view term->reasoning modelA model trained to produce an internal chain of thought before its final answer, trading extra deliberation for higher capability on hard problems.view term->
At a glance
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first used
jul 2026
Appears in
  • Why expensive models make terrible execution subagentsSubagent model selection has one costly default. Reasoning models obey their own traces 15.6% of the time, so here is where to pin model and effort.opinion1 min
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