Run: 2026-02-16-01KHK9RVS8Z7SPYBS8MCCSYDZ8

Run Details

Duration:
23.3s
Cost:
$0.020092
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 stitched the harbor fog as Inspector Mara Voss arrived, summoned to the Halloway Hotel before sunrise, alone at once. Inside, the lobby clock ticked too loudly, and the clerk avoided her eyes, offering a brass room key without comment. On the third floor, a corridor smelled of lilies and coal smoke, though no fireplace burned there tonight at all. Room seventeen stood ajar, its lamp still lit, casting honeyed light across scattered letters and broken glass shards on carpet. The victim, Judge Halloway, lay facedown by the window, hands ink stained, throat bruised, pockets empty despite his locked door. Mara noted no blood, no weapon, only a damp footprint beside the radiator, pointing toward the stairwell and then vanishing. A violin played somewhere below, a slow waltz repeating, while guests slept, or pretended, behind polished doors through the night. She picked up the letters, realizing each bore her name, and one carried fresh ash from yesterday's train to Blackport. When the clerk returned, he whispered that everyone had alibis, yet the judge checked in under hers using her signature. Mara closed the door gently, listening to the waltz stop, and understood the murderer watched her already from the shadows.
created_at"2026-02-16T13:21:18.289884+00:00" 2/16/2026, 1:21:18 PM
model"openai/gpt-5.2-20251211"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4811
moderation_latency(null)
generation_time23126
tokens_prompt46
tokens_completion972
native_tokens_prompt41
native_tokens_completion1430
native_tokens_completion_images0
native_tokens_reasoning1155
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"
usage0.02009175
router(null)
provider_responses
0
id"resp_0ce1d1f5b067c74201699319b62468819399ac941e57da436c"
status200
is_byokfalse
latency149
endpoint_id"f00142c2-6a93-49ce-9e36-5593b904ce3b"
provider_name"OpenAI"
model_permaslug"openai/gpt-5.2-20251211"
api_type"completions"
id"gen-1771248054-bHBxuwt0DZ696yf9zJPI"
upstream_id"resp_0ce1d1f5b067c74201699319b62468819399ac941e57da436c"
total_cost0.02009175
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