Run: 2026-02-16-01KHKAP4EPTP54JY9R26V20KRV

Run Details

Duration:
35.4s
Cost:
$0.021141
Provider:
OpenAI

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
Rain battered the sleepy harbor town as the night ferry arrived late, its horn echoing across fog-choked water and alleys. Detective Mara Leland stepped onto the slick pier, collar raised, already regretting answering the chief's midnight summons from her apartment. The ferry's gangway groaned downward, revealing anxious passengers clustered together, faces lit ghostly by swaying bulbs and emergency exit signs. At the edge of the crowd, Captain Rourke waited alone, white-knuckled grip crushing his cap, eyes avoiding Mara's approach entirely. She smelled copper beneath diesel fumes even before seeing the stretcher, sheeted shape too small for the fussing paramedics nearby. Rourke's voice cracked as he explained the passenger list showed thirty names, yet thirty-one bodies now waited onshore for identification. The extra corpse, uncovered with reluctant ceremony, displayed a single puncture beneath the ribs, shirt soaked black despite torrential rain. According to Rourke, every cabin door had been bolted from inside at docking, security cameras looping harmless seascapes all night. Mara studied the shivering line of travelers, calculating alibis and grudges while gulls screamed overhead like impatient, hungry jurors nearby. Somewhere among them, she knew, stood a killer who murdered in a locked room and added themselves to nobody's list.
created_at"2026-02-16T13:37:29.221507+00:00" 2/16/2026, 1:37:29 PM
model"openai/gpt-5.1-20251113"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency32065
moderation_latency(null)
generation_time34741
tokens_prompt46
tokens_completion449
native_tokens_prompt41
native_tokens_completion2109
native_tokens_completion_images0
native_tokens_reasoning1821
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"completed"
usage0.02114125
router(null)
provider_responses
0
id"resp_0e3dda7655f1135b0169931d7552bc81968c116a59a8ed0b66"
status200
is_byokfalse
latency177
endpoint_id"764eb97f-8bab-4326-b29b-7a8799b00a70"
provider_name"OpenAI"
model_permaslug"openai/gpt-5.1-20251113"
api_type"completions"
id"gen-1771249013-J2MiiZNTFjysPiqj0ysb"
upstream_id"resp_0e3dda7655f1135b0169931d7552bc81968c116a59a8ed0b66"
total_cost0.02114125
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
88.1959% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
021
120
220
321
420
521
620
720
820
920