Ask for a fix, not a redo
Using AI
Name what to keep and what to change, and get back only the changed part instead of a full rewrite.
Fill the blanks and it copies as you filled it
Revise your last answer. - Leave alone: - What to change and why: - What I didn't tell you before: - Show me only the part you changed, and don't rewrite the whole thing
0 of 3 blanks filled · anything left blank copies with its brackets
When you say "do it again", the whole thing is regenerated from scratch. Name the part to change and only that part is rebuilt. The number of follow-up turns is what drives your total tokens, so this is the biggest saving on the site. If three rounds of fixes still haven't landed, start a new conversation instead of continuing. The longer a conversation runs, the more the whole history is reprocessed every turn, so context built in the wrong direction only costs you.
What this prompt does
Compared with asking the same thing without the length and format lines.estimate
Estimated output tokens
700
Asked loosely
180
This prompt
Energy (Wh)
1.215
Asked loosely
0.423
This prompt
Token counts are estimated from character counts, not measured. Energy uses the per-band figures measured by Jegham et al. 2025 as published.
What that saves
15.8 Wh · 5.54 gCO₂e · 74 mL — assuming 20 uses a day
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
We read the prompt to see whether it carries that instruction. The percentages below are published figures for the rule itself, not a measurement of 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