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Rewrite · 5 checks · max 400 tokens · benched 2026-09-16

GPT-5.5 vs GPT-5.4 vs GPT-5.4 mini vs GPT-5.4 Nano vs GPT-5.3-Codex on rewrite a stiff notice in a friendly tone

OpenAI models side by side on "Rewrite a stiff notice in a friendly tone": GPT-5.4 Nano scores 10/10; GPT-5.4 Nano is the cheapest answer scoring 8+ at $0.09 per 1,000 runs. Outputs, checks, judge reasons, latency and cost.

The prompt every model received

User

Rewrite the notice below in a warm, friendly, plain-English tone for a company-wide chat message. Keep every fact, including the date and time, in at most 80 words. Do not use the words "hereby" or "pursuant". Output only the rewritten message.

Notice: Staff are hereby informed that, pursuant to the scheduled electrical maintenance, the third-floor kitchen will be unavailable on Friday 3 October between 08:00 and 11:00. Alternative facilities are available on the second floor. Your cooperation is appreciated.

Rubric for the judge: Genuinely friendly tone, all facts kept (date, times, floor, alternative kitchen), under 80 words, no banned words.

Side by side

Every cell is one OpenRouter call at temperature 0 with the prompt's token cap and reasoning effort "low" where the model supports it. Cost is usage × the catalogue rate in models.json. Quality is one judge call to anthropic/claude-haiku-4.5 against the prompt's rubric, cached per prompt version.

GPT-5.5

openai/gpt-5.5

10/10
Latency
402ms
Cost
$0.00289
Per 1,000
$2.89

116 in · 77 out (22 reasoning) · 36 words · checks 5/5

  • max_words
  • contains
  • contains
  • not_contains
  • not_contains
Hi everyone, due to scheduled electrical maintenance, the third-floor kitchen will be unavailable on Friday 3 October from 08:00 to 11:00. Please use the facilities on the second floor during this time. Thanks for your cooperation!

Judge: Rewrite is warm and friendly, includes all facts (date, times, floors, alternative location), is 43 words (well under 80), avoids banned words, and uses plain English.

GPT-5.4

openai/gpt-5.4

10/10
Latency
390ms
Cost
$0.00122
Per 1,000
$1.22

116 in · 62 out (9 reasoning) · 34 words · checks 4/5

  • max_words
  • contains
  • contains
  • not_contains
  • not_contains
Hi everyone — due to scheduled electrical maintenance, the third-floor kitchen will be unavailable on Friday 3 October from 08:00 to 11:00. Please use the second-floor kitchen during that time. Thanks for your cooperation.

Judge: Warm and friendly tone achieved, all facts preserved (date, time, floors, alternative location), 39 words (well under 80), no banned words used, and formatted as a single message.

GPT-5.4 mini

openai/gpt-5.4-mini

10/10
Latency
759ms
Cost
$0.00047
Per 1,000
$0.47

116 in · 84 out (28 reasoning) · 37 words · checks 4/5

  • max_words
  • contains
  • contains
  • not_contains
  • not_contains
Hi everyone — just a heads-up that the third-floor kitchen will be unavailable on Friday 3 October from 08:00 to 11:00 for scheduled electrical maintenance. Please use the second-floor facilities instead. Thanks for your understanding and cooperation.

Judge: Rewrites notice in warm, friendly plain English; retains all facts (date, times, floors, reason); 44 words (well under 80); avoids banned words; perfectly meets rubric.

GPT-5.4 Nano

openai/gpt-5.4-nano

10/10
top judge scorecheapest scoring 8+
Latency
283ms
Cost
$9.1e-5
Per 1,000
$0.09

116 in · 54 out · 36 words · checks 5/5

  • max_words
  • contains
  • contains
  • not_contains
  • not_contains
Hi everyone—due to scheduled electrical maintenance, the third-floor kitchen will be unavailable on Friday 3 October from 08:00 to 11:00. Please use the alternative facilities on the second floor during this time. Thanks for your cooperation!

Judge: Rewrites notice in warm, friendly plain English; retains all facts (date, times, floors, alternative location); 39 words (well under 80); avoids banned words; perfectly formatted as requested.

GPT-5.3-Codex

openai/gpt-5.3-codex

10/10
Latency
838ms
Cost
$0.00158
Per 1,000
$1.57

116 in · 98 out (36 reasoning) · 39 words · checks 4/5

  • max_words
  • contains
  • contains
  • not_contains
  • not_contains
Hi everyone—just a quick heads-up: because of scheduled electrical maintenance, the third-floor kitchen will be unavailable on Friday 3 October from 08:00 to 11:00. Please use the second-floor kitchen facilities during that time. Thanks so much for your cooperation!

Judge: Warm, friendly tone achieved; all facts preserved (date, times, floors, alternative location); 48 words (well under 80); banned words avoided; perfectly formatted as requested.

Frequently asked

What does this prompt test?

Rewrite: Genuinely friendly tone, all facts kept (date, times, floor, alternative kitchen), under 80 words, no banned words. The deterministic checks are max_words, contains, contains, not_contains, not_contains.

Which model should I pick for this task?

If the judge's bar of 8/10 is good enough for you, GPT-5.4 Nano at $0.09 per 1,000 runs. If you need the top score, GPT-5.4 Nano at $0.09 per 1,000 runs.

Same prompt, other families

Run it yourself

Re-run this prompt on OpenAI with your own OpenRouter key, or tweak the wording and see what changes.

More OpenAI prompts

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