Run: 2026-02-16-01KHKAGZE3VTYZHW26CAWQD3MC

Run Details

Duration:
43.2s
Cost:
$0.025191
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 hammered the old train station roof as midnight passengers clustered beneath flickering lamps, whispering about missed connections and ghosts. Detective Mara Quinn stepped from the last carriage, coat dripping, eyes narrowed, measuring the room before anyone noticed her arrival. A scream rode the wind down the platform, raw and rising, curdling chatter into silence and tightening every spine there. Porter Elias staggered from the ticket booth, face ashen, pointing past track three where a body sprawled beneath advertisements peeling. The businessman lay immaculate except his throat, which gaped like a second mouth, red smile shadowed by a fallen hat. Steam from a parked engine drifted over him, softening edges, while the station clock wheezed midnight again like tired testimony. Mara knelt, resisting the urge to touch, and sent the porter sprinting for constables, her gaze harvesting unsettled faces nearby. A blood bead clung to the victim's earlobe, drying to rust, while his cuff showed a thumbprint smeared in ink. Two travelers argued quietly about luggage ownership, each insisting ignorance of the trunk between them, its brass corners newly scratched. Mara noticed the arrival board frozen on delayed, cities stalled, as though the murderer had paused time to exit unseen.
created_at"2026-02-16T13:34:48.117222+00:00" 2/16/2026, 1:34:48 PM
model"openai/gpt-5-2025-08-07"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency19387
moderation_latency(null)
generation_time42529
tokens_prompt46
tokens_completion1021
native_tokens_prompt41
native_tokens_completion2514
native_tokens_completion_images0
native_tokens_reasoning2240
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"
usage0.02519125
router(null)
provider_responses
0
id"resp_04d8df9994f3e46b0169931ccc52a88193b44a666eb50d79a4"
status200
is_byokfalse
latency155
endpoint_id"7c2f859a-7890-4e8e-b1de-1cd1c0a800b4"
provider_name"OpenAI"
model_permaslug"openai/gpt-5-2025-08-07"
api_type"completions"
id"gen-1771248844-kyEdGnpIe2FwwTE0ZUEz"
upstream_id"resp_04d8df9994f3e46b0169931ccc52a88193b44a666eb50d79a4"
total_cost0.02519125
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.0000% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
020
120
220
320
420
520
620
720
820
920