Answer only from this document
ResearchStudy
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- Question:
- Three points or fewer, two sentences each at most0 of 1 blanks filled · anything left blank copies with its brackets
What this prompt does
Compared with asking the same thing without the length and format lines.estimate
Estimated output tokens
700
Asked loosely
320
This prompt
Energy (Wh)
1.215
Asked loosely
0.423
This prompt
Tokens estimated from characters; energy measured by Jegham et al. 2025.
What that saves
15.8 Wh · 5.54 gCO₂e · 74 mL — assuming 20 uses a day — the global average is 3.7 (Chatterji et al. 2025)
Tap a card for how the conversion was done.
Reported backfire — Specifying output lengthSpecifying a length longer than needed backfires (a 34% increase in 11% of scenarios)
Where these figures come from
Published figures for the rule itself — not what this prompt saves.
Specifying output length
38.7%mean reduction · 95% CI 29.7–47.7%
Podder et al. 2026 BP#5 · 18 use cases / 57 prompts
by modelGPT-4o 35%Command R+ 49%Mistral-7B 32%
Reduced in every scenario. No backfire reported
Limiting it to the material given
자료 범위 제한
· Anthropic, Reduce hallucinations — 제공한 자료만 쓰도록 명시적으로 제한할 것
· Anthropic, Reduce hallucinations — 근거를 찾을 수 없는 주장은 철회하도록 요구할 것
· 팀 자료, 상황별 에코 프롬프트 48개 중 24번·41번