Run: 2026-02-20-01KHXQAJTY27KD27HQ5GZ3E255

Run Details

Duration:
6.5s
Cost:
$0.000522
Provider:
Mistral

Evaluation summary

Score Evaluator
Details Link
57.54% 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 far more sinister than polite hospitality. Lady Whitmore’s emerald necklace glinted too brightly, her laughter sharp enough to cut through the thick tension in the air. A sudden clatter from the library sent the footman scrambling, his pale face suggesting he already knew what lay beyond. The body sprawled across the Persian rug, a silver letter opener buried deep where the heart should have been beating. Blood pooled slowly, seeping into the fibers like whispers of secrets someone had desperately wanted to keep hidden forever. Each guest exchanged glances, their carefully practiced smiles crumbling under the weight of unspoken accusations hanging between them. The grandfather clock chimed midnight, its brass pendulum swinging like a noose over the room where death had just claimed another victim. Detective Harlow knelt beside the corpse, noticing the missing pocket watch—its absence a clue or a deliberate red herring left behind. Somewhere in the house, a floorboard creaked, the sound too deliberate to be dismissed as merely the wind’s restless sigh.
created_at"2026-02-20T14:30:10.537Z" 2/20/2026, 2:30:10 PM
model"mistralai/mistral-medium-3.1" 3/1/2001, 12:00:00 AM
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency265
moderation_latency(null)
generation_time6449
tokens_prompt46
tokens_completion341
native_tokens_prompt39
native_tokens_completion253
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"
usage0.0005216
router(null)
provider_responses
0
endpoint_id"13c5002b-8c5b-490c-8a5f-52ec0242804f"
id"22e52413e88a4ab89dd32cd3848691c8"
is_byokfalse
latency265
model_permaslug"mistralai/mistral-medium-3.1" 3/1/2001, 12:00:00 AM
provider_name"Mistral"
status200
api_type"completions"
id"gen-1771597810-DWOrcJp2hzIdDzpwHLxA"
upstream_id"22e52413e88a4ab89dd32cd3848691c8"
total_cost0.0005216
cache_discount(null)
upstream_inference_cost0
provider_name"Mistral"

Evaluation details

Result Evaluator Details Meta Data
57.54% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
019
118
220
320
420
519
618
722
822
920