NC Bench
Overview
About
Tests
Models
Model
o4 Mini
Test
N-Length Sentences
Scenario
Write sentences with 20 words each
Run ID
2025-04-16-01JRZYW5SP4AZ3CBJWWKEAHPD0
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
Messages
Meta
AI
Thunder rumbled ominously as the thick fog crept along ancient cobblestone alleyways, quietly shrouding distant figures in spectral gray gloom. Detective Marlowe tightened her leather gloves, steeling nerves against cold murmurs echoing from silent, shadowed doorways before unlocking dangerous secrets. A crimson smear stained the ancient oak floorboards, hinting at brutality hidden beneath brittle polished varnish and whispered polite courtesy. Moonlight sliced through shattered stained-glass windows, illuminating splintered reflections and revealing a single ancient, bloodstained leather-bound journal lying ominously open. Outside, town clock chimed midnight, its hollow toll summoning hidden nightmares and echoing throughout deserted streets, promising vengeful secrets uncovered.
id
"gen-1744829290-WU3Fx45ChVkUo4vtq8VV"
upstream_id
"chatcmpl-BN25qrV3uQKMtKQ33PuKi4ybhQPW1"
total_cost
0.0089595
cache_discount
(null)
provider_name
"OpenAI"
created_at
"2025-04-16T18:48:31.028512+00:00"
Wednesday, April 16th, 2025 at 6:48:31 PM GMT+00:00
model
"openai/o4-mini-2025-04-16"
app_id
182717
streamed
true
cancelled
false
latency
19786
moderation_latency
110
generation_time
20012
tokens_prompt
42
tokens_completion
2007
native_tokens_prompt
41
native_tokens_completion
2026
native_tokens_reasoning
1856
num_media_prompt
(null)
num_media_completion
(null)
num_search_results
(null)
origin
"https://ncbench.com/"
is_byok
false
finish_reason
"stop"
native_finish_reason
"stop"
usage
0.0089595
Evaluation details
Result
Evaluator
Details
Meta Data
82.7067%
Matches word count
n/a
neededClean
false
sentences
5
wordCounts
0
20
1
20
2
20
3
22
4
20