Model

GPT-4.1 Nano

Test

N-Length Sentences

Scenario

Write sentences with 20 words each

Run ID

2025-04-14-01JRTSXQP3S2A32F4PXE5E4BR8

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
The moon cast faint light over the abandoned mansion as shadows flickered behind broken windows, whispering secrets of long-forgotten crimes. Detective Harris arrived silently, eyes sharp, noticing an overturned chair and bloodstains lining the marble floor, hinting at chaos. A cold breeze swept through the open doorway, carrying scents of fear, desperation, and something sinister lurking beneath the surface now revealed. Inside, a body sprawled facedown, with a crimson pool spreading across the exquisite Persian rug, eyes staring unseeing into the darkened ceiling. Nearby, a shattered mirror reflected fragmented images of the scene, revealing hints of broken glass and smudged fingerprints, clues waiting to be uncovered.
id"gen-1744656326-Z57gYFEBnbZ1tJ6QrbZs" 
upstream_id"chatcmpl-BMJ678nIOcC4Cmqe4NAePlhQ5B6qe" 
total_cost0.0000618
cache_discount(null)
provider_name"OpenAI" 
created_at"2025-04-14T18:45:29.008598+00:00" Monday, April 14th, 2025 at 6:45:29 PM GMT+00:00
model"openai/gpt-4.1-nano-2025-04-14" 
app_id182717
streamedtrue
cancelledfalse
latency492
moderation_latency102
generation_time1115
tokens_prompt42
tokens_completion143
native_tokens_prompt42
native_tokens_completion144
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" 
usage0.0000618

Evaluation details

Result Evaluator Details Meta Data
29.8968% Matches word count n/a
neededCleanfalse
sentences5
wordCounts
021
119
222
322
423