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02 · Reasoning Cost

Reasoning Efficiency

The model producing correct output with minimal interpretive overhead — the reward for clean context.

Reasoning Efficiency is the positive outcome that all the negative terms in this category point toward. When context is clean, structured, and focused, the model spends its reasoning budget on the actual task rather than on interpretation. The result is faster responses, lower cost, higher accuracy, and less need for follow-up corrections. Reasoning Efficiency isn't a feature you turn on — it's what happens naturally when Context Debt, Prompt Bloat, and Reasoning Load are minimized.

Example
Two developers send the same bug fix request. Developer A gets a correct fix in one turn with 800 reasoning tokens. Developer B gets a partially wrong fix in three turns totaling 4,200 reasoning tokens. Same model, same bug, same day. The difference is that Developer A provided a clear problem statement, the relevant code, the expected vs. actual behavior, and the constraint ("don't change the public API"). Developer B said "it's broken, fix it" and attached the whole file. Developer A's Reasoning Efficiency was 5x higher.

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