Model

GPT-4.1

Test

N-Length Sentences

Scenario

Write sentences with 20 words each

Run ID

2025-04-14-01JRTSRHS639AYY70H423RH68Q

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 20 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Thunder rattled the ancient windows as Eleanor Hastings entered the library, her heels clicking sharply across the marble-tiled floor. A solitary grandfather clock chimed midnight, its resonant echo swallowing the whispers of the assembled guests clutching crystal cocktail glasses. Rain drummed a frenetic rhythm on the roof above, mirroring Eleanor's racing heart as she scanned the lavishly furnished room. Cigar smoke lingered in curling tendrils, mingling with the musky scent of leather-bound tomes lining the dark mahogany shelves. Suddenly, a piercing scream shattered the uneasy silence, and every face turned in horror toward the velvet-draped billiards alcove. There, beneath a shattered decanter and scattered playing cards, Lord Wexley slumped motionless, a dark stain blooming beneath him. Eleanor’s breath caught in her throat as she realized someone in this very room was now a ruthless murderer.
id"gen-1744656157-TIx1X1buYT9wCS1qUdTC" 
upstream_id"chatcmpl-BMJ3NqoENKONlfszuFWsMZGefnrwz" 
total_cost0.001612
cache_discount(null)
provider_name"OpenAI" 
created_at"2025-04-14T18:42:40.512399+00:00" Monday, April 14th, 2025 at 6:42:40 PM GMT+00:00
model"openai/gpt-4.1-2025-04-14" 
app_id182717
streamedtrue
cancelledfalse
latency565
moderation_latency75
generation_time2178
tokens_prompt42
tokens_completion190
native_tokens_prompt42
native_tokens_completion191
native_tokens_reasoning0
num_media_prompt(null)
num_media_completion(null)
num_search_results(null)
origin"https://ncbench.com/" 
is_byokfalse
finish_reason"stop" 
native_finish_reason"stop" 
usage0.001612

Evaluation details

Result Evaluator Details Meta Data
88.7580% Matches word count n/a
neededCleanfalse
sentences7
wordCounts
020
120
220
320
420
519
619