Run: 2026-02-16-01KHKB2TF8S8HRZRNVYKE110Z9

Run Details

Duration:
25.9s
Cost:
$0.019221
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 station roof as the last train wheezed away, abandoning Platform Three to flickering fluorescent ghosts that lingered. Detective Mara Iwasaki watched reflections jitter across puddles, counting footsteps behind her that stubbornly refused matching numbers in the dark. The call had mentioned a body on the tracks, but dispatch's voice carried something heavier than ordinary midnight tragedy tonight. Two uniformed officers waited near the edge, their breath steaming upward like offerings as trains howled unseen through neighboring tunnels. Floodlights bleached the gravel, revealing a man's body sprawled between rails, umbrella still folded neatly beside gloved, bloodless fingers there. No train was scheduled for hours, yet his crushed ribs suggested steel and speed, while immaculate shoes contradicted any desperation. Mara crouched, noticing tiny black crescents beneath his nails, each rimmed with glittering quartz dust that did not belong here. When she rolled him gently, the station clock chimed midnight, and everyone saw his throat was missing an apology entirely.
created_at"2026-02-16T13:44:15.46626+00:00" 2/16/2026, 1:44:15 PM
model"openai/gpt-5.1-20251113"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency12233
moderation_latency(null)
generation_time25753
tokens_prompt46
tokens_completion947
native_tokens_prompt41
native_tokens_completion1917
native_tokens_completion_images0
native_tokens_reasoning1699
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"
usage0.01922125
router(null)
provider_responses
0
id"resp_04d58f781b53b4590169931f150b7c8197aa4c7b7cf77a3762"
status200
is_byokfalse
latency146
endpoint_id"764eb97f-8bab-4326-b29b-7a8799b00a70"
provider_name"OpenAI"
model_permaslug"openai/gpt-5.1-20251113"
api_type"completions"
id"gen-1771249428-nmOyR0XbWsewSLUZ9IV1"
upstream_id"resp_04d58f781b53b4590169931f150b7c8197aa4c7b7cf77a3762"
total_cost0.01922125
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.0000% Matches word count n/a
neededCleanfalse
sentences8
wordCounts
020
120
220
320
420
520
620
720