NC Bench
Overview
About
Tests
Models
Model
o4 Mini
Test
N-Length Sentences
Scenario
Write sentences with 20 words each
Run ID
2025-04-16-01JRZZ3Z50CFN1F6MXD7D9F0VF
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 above the manor’s slate roof as lightning flashed, revealing crimson footprints leading across the wide polished marble foyer. Detective Ellis arrived, tightening his raincoat collar against the wind, surveying each ominous stain, calculating motives hidden in silent shadows. A single pearl earring lay beside her lifeless hand, its lustrous orb stained with dewdrops and dark drying glistening blood. Outside, the wind-whipped hedges creaked like warning whispers while distant footsteps echoed, betraying an unseen furtive intruder’s secret midnight investigation. Inside the dimly lit library, a hidden envelope lay wedged under ancient volumes, promising revelations that would shatter this household.
id
"gen-1744829545-V2CnR6etHl3LHlRn6Rnz"
upstream_id
"chatcmpl-BN29ysrNrlU2uOq5L8dkKMYJzhwQJ"
total_cost
0.0100243
cache_discount
(null)
provider_name
"OpenAI"
created_at
"2025-04-16T18:52:55.293034+00:00"
Wednesday, April 16th, 2025 at 6:52:55 PM GMT+00:00
model
"openai/o4-mini-2025-04-16"
app_id
182717
streamed
true
cancelled
false
latency
27179
moderation_latency
195
generation_time
28845
tokens_prompt
42
tokens_completion
2249
native_tokens_prompt
41
native_tokens_completion
2268
native_tokens_reasoning
2112
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
0.0100243
Evaluation details
Result
Evaluator
Details
Meta Data
92.1306%
Matches word count
n/a
neededClean
false
sentences
5
wordCounts
0
20
1
20
2
20
3
21
4
20