Run: 2026-02-20-01KHXQ6DCFKFJESKHRRANKS5JN

Run Details

Duration:
7.8s
Cost:
$0.000555
Provider:
Mistral

Evaluation summary

Score Evaluator
Details Link
1.50% 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 scuffed, leather boots with quiet disdain. A scream sliced through the night, sharp as broken glass, freezing him mid-step near the alley’s mouth. The body lay sprawled beneath the flickering streetlamp, limbs twisted like a discarded marionette’s strings. Blood, black in the dim light, seeped into the cracks between the stones, tracing a macabre map. Harlow knelt, gloved fingers brushing the victim’s coat—fine wool, now ruined by the storm’s cruel touch. A playing card, the ace of spades, rested near the corpse, edges curled from the damp air. The victim’s face was frozen in surprise, lips parted as if to whisper a final, unheard secret. A shadow shifted at the alley’s end, just beyond the reach of the sputtering, dying lamplight. Harlow’s hand drifted to his revolver, eyes narrowing as the figure melted into the downpour’s relentless curtain. The air smelled of wet iron and something sweeter—perfume, perhaps, or the ghost of a lie. A distant clock tower chimed midnight, its hollow notes swallowed by the storm’s hungry, howling breath. The victim’s pocket watch had stopped at 11:47, its hands locked in a moment stolen by violence. Harlow exhaled, his breath curling like smoke, as the first clue whispered its silent, deadly promise. Somewhere in the city, a door clicked shut, sealing the killer’s escape into the storm’s embrace.
created_at"2026-02-20T14:27:53.881Z" 2/20/2026, 2:27:53 PM
model"mistralai/mistral-large-2512" 1/1/2512, 12:00:00 AM
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency348
moderation_latency(null)
generation_time7701
tokens_prompt46
tokens_completion416
native_tokens_prompt39
native_tokens_completion357
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"
usage0.000555
router(null)
provider_responses
0
endpoint_id"fa718841-07ea-4b7e-b8a3-6069545c7e6a"
id"3e2eedb1443f4dd9aa00c77df2370052"
is_byokfalse
latency348
model_permaslug"mistralai/mistral-large-2512" 1/1/2512, 12:00:00 AM
provider_name"Mistral"
status200
api_type"completions"
id"gen-1771597673-CS7d0wwsap9t9mZWQu9W"
upstream_id"3e2eedb1443f4dd9aa00c77df2370052"
total_cost0.000555
cache_discount(null)
upstream_inference_cost0
provider_name"Mistral"

Evaluation details

Result Evaluator Details Meta Data
1.50% Matches word count n/a
neededCleanfalse
sentences15
wordCounts
015
117
218
315
417
517
617
717
816
917
1017
1116
1217
1316
1416