Run: 2026-02-20-01KHXPRR4HS5TKQ2ZHGQFXMDT0

Run Details

Duration:
5.5s
Cost:
$0.000530
Provider:
Mistral

Evaluation summary

Score Evaluator
Details Link
63.81% 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 Mercer adjusted his gloves, watching the butler’s stiff posture betray something unseen beneath his polished professional demeanor. A scream shattered the silence just as the clock struck nine, echoing through halls lined with portraits of long-dead ancestors. Lady Whitmore’s diamond brooch lay shattered on the marble floor, its gems scattered like stars around her motionless, elegantly dressed body. The air smelled of lavender and gunpowder, a contradiction that hung heavy as whispers spread among the assembled suspects. Each guest claimed innocence, yet their eyes darted toward the library door, left slightly ajar as if inviting scrutiny. Mercer knelt beside the body, noticing a single playing card—the ace of spades—tucked into her lifeless, manicured fingers. Outside, thunder rumbled as the detective stood, his gaze sweeping over the room where secrets simmered behind forced smiles. The butler cleared his throat, his voice trembling while announcing the telephone lines had been cut by an unknown hand. Mercer’s pulse steadied; he knew the killer remained among them, waiting for the next carefully calculated move to unfold.
created_at"2026-02-20T14:20:26.144Z" 2/20/2026, 2:20:26 PM
model"mistralai/mistral-medium-3.1" 3/1/2001, 12:00:00 AM
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency237
moderation_latency(null)
generation_time5401
tokens_prompt46
tokens_completion340
native_tokens_prompt39
native_tokens_completion257
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"
usage0.0005296
router(null)
provider_responses
0
endpoint_id"13c5002b-8c5b-490c-8a5f-52ec0242804f"
id"0fdd2631cf7543c08a115e718701897f"
is_byokfalse
latency237
model_permaslug"mistralai/mistral-medium-3.1" 3/1/2001, 12:00:00 AM
provider_name"Mistral"
status200
api_type"completions"
id"gen-1771597226-fBN06TO4WBhjq5PRJGea"
upstream_id"0fdd2631cf7543c08a115e718701897f"
total_cost0.0005296
cache_discount(null)
upstream_inference_cost0
provider_name"Mistral"

Evaluation details

Result Evaluator Details Meta Data
63.81% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
019
118
221
321
419
519
620
719
820
919