Run: 2026-02-20-01KHXPHB71MBYW820B9KG61CGY

Run Details

Duration:
4.6s
Cost:
$0.000544
Provider:
Mistral

Evaluation summary

Score Evaluator
Details Link
64.95% 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 grand estate loomed under storm clouds, its windows flickering with candlelight as guests arrived for dinner that evening. Detective Harlow adjusted his cufflinks, watching the butler’s stiff posture betray something unseen beneath his polished demeanor. A scream shattered the silence just as the clock struck midnight, echoing through halls lined with portraits of dead ancestors. Lady Whitmore clutched her pearls, her trembling voice whispering about the missing diamond brooch last seen around her nephew’s throat. The study door creaked open, revealing a body sprawled across the Persian rug, a single playing card clutched in its lifeless fingers. Inspector Graves knelt beside the victim, noting the scent of bitter almonds lingering near the half-empty glass of brandy. A shadow darted past the hallway mirror, but when Harlow turned, only the flicker of dying candles answered his sharp inquiry. The guests exchanged glances, each face a mask of innocence, though one pair of hands trembled just slightly too much. Outside, thunder rolled as the detective’s gaze settled on the grand fireplace, where a charred letter’s edge curled into ash. Somewhere in the house, a floorboard groaned under cautious footsteps, while the storm erased any trace of who had come or gone.
created_at"2026-02-20T14:16:23.533Z" 2/20/2026, 2:16:23 PM
model"mistralai/mistral-medium-3.1" 3/1/2001, 12:00:00 AM
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency247
moderation_latency(null)
generation_time4512
tokens_prompt46
tokens_completion340
native_tokens_prompt39
native_tokens_completion264
native_tokens_completion_images(null)
native_tokens_reasoning0
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"stop"
usage0.0005436
router(null)
provider_responses
0
endpoint_id"13c5002b-8c5b-490c-8a5f-52ec0242804f"
id"f86d7ee7202c469a9171105f0d8f9518"
is_byokfalse
latency247
model_permaslug"mistralai/mistral-medium-3.1" 3/1/2001, 12:00:00 AM
provider_name"Mistral"
status200
api_type"completions"
id"gen-1771596983-sFy8fungTVlghV05FmCi"
upstream_id"f86d7ee7202c469a9171105f0d8f9518"
total_cost0.0005436
cache_discount(null)
upstream_inference_cost0
provider_name"Mistral"

Evaluation details

Result Evaluator Details Meta Data
64.95% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
019
117
220
320
422
520
621
720
820
922