Run: 2026-02-20-01KHXQHD9JBJFMPYGAHMXRPWB6

Run Details

Duration:
8.9s
Cost:
$0.000634
Provider:
Mistral

Evaluation summary

Score Evaluator
Details Link
0.01% Matches word count (details)

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
The rain hammered against the cobblestones, turning the gaslight’s glow into a hazy, golden smear. Detective Harlow adjusted his hat, watching the water pool around his polished, black leather shoes. A scream sliced through the night, sharp as the knife still clutched in the victim’s hand. The body sprawled across the alley, limbs twisted like a marionette cut cruelly from its strings. Blood seeped into the cracks, dark and thick, mixing with the rain in a macabre dance. Harlow knelt, ignoring the cold bite of the puddle soaking through his trousers. The victim’s eyes stared blankly upward, reflecting the flickering light like shattered glass. A single playing card, the Queen of Spades, rested just beyond the outstretched fingers. The alley reeked of damp wool, copper, and something sickly sweet—cheap perfume or decay. A shadow shifted near the fire escape, but when Harlow looked, nothing remained. The victim’s pocket watch had stopped at 11:47, its hands frozen in silent accusation. Harlow’s partner, Graves, arrived panting, his breath curling in the frigid night air. “Another one,” Graves muttered, his voice tight with the weight of too many unsolved cases. The streetlamp buzzed overhead, casting long, wavering fingers that clawed at the brick walls. Harlow noticed the muddy boot print pressed into the wet ground near the victim’s head. A torn scrap of fabric, emerald green, fluttered from the rusted drainpipe above. The victim’s lips were parted, as if whispering a name no one would ever hear. Harlow’s fingers brushed the knife’s hilt, but he left it where it lay. Somewhere in the distance, a church bell tolled midnight, hollow and mournful. The rain kept falling, washing away the truth drop by relentless, indifferent drop.
created_at"2026-02-20T14:33:54.237Z" 2/20/2026, 2:33:54 PM
model"mistralai/mistral-large-2512" 1/1/2512, 12:00:00 AM
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency346
moderation_latency(null)
generation_time8812
tokens_prompt46
tokens_completion482
native_tokens_prompt39
native_tokens_completion410
native_tokens_completion_images(null)
native_tokens_reasoning0
native_tokens_cached16
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"stop"
usage0.0006345
router(null)
provider_responses
0
endpoint_id"fa718841-07ea-4b7e-b8a3-6069545c7e6a"
id"f67d10cfdccb43d183e11475d0e4ebca"
is_byokfalse
latency346
model_permaslug"mistralai/mistral-large-2512" 1/1/2512, 12:00:00 AM
provider_name"Mistral"
status200
api_type"completions"
id"gen-1771598034-m4BjDp23c3NmvDmvDL95"
upstream_id"f67d10cfdccb43d183e11475d0e4ebca"
total_cost0.0006345
cache_discount(null)
upstream_inference_cost0
provider_name"Mistral"

Evaluation details

Result Evaluator Details Meta Data
0.01% Matches word count n/a
neededCleanfalse
sentences18
wordCounts
015
115
216
316
416
513
613
714
815
913
1014
1113
1244
1313
1415
1513
1612
1713