Run: 2026-02-20-01KHXQK515MZXQWFM5JSTY8ZT0

Run Details

Duration:
4.8s
Cost:
$0.000536
Provider:
Mistral

Evaluation summary

Score Evaluator
Details Link
75.61% 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 gilded gates creaking ominously as thunder rolled across the desolate moors. Detective Harlow adjusted his damp trench coat, eyes scanning the gravel drive where fresh tire tracks vanished into the mist. A single candle flickered in the foyer, casting long shadows over the marble floor where a shattered vase lay scattered. Lady Whitmore’s butler stood rigid, his pale hands trembling as he clutched a bloodstained handkerchief to his trembling lips. The air smelled of lavender and something metallic, lingering like a ghost in the oppressive silence of the abandoned ballroom. Footsteps echoed from the upper hallway, too deliberate to belong to any living soul still residing within these cursed walls. A scream had woken the household at midnight, but now only the ticking grandfather clock dared to break the suffocating quiet. Harlow’s gloved fingers brushed the mantelpiece, where a framed photograph of the late lord had been deliberately turned facedown. The butler’s voice cracked as he whispered, "No one enters the west wing after dark—not since the last murder." A door slammed somewhere deep in the house, sending a flock of ravens scattering from the oak tree outside the shattered window.
created_at"2026-02-20T14:34:51.31Z" 2/20/2026, 2:34:51 PM
model"mistralai/mistral-medium-3.1" 3/1/2001, 12:00:00 AM
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency220
moderation_latency(null)
generation_time4687
tokens_prompt46
tokens_completion332
native_tokens_prompt39
native_tokens_completion260
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"
usage0.0005356
router(null)
provider_responses
0
endpoint_id"13c5002b-8c5b-490c-8a5f-52ec0242804f"
id"f90e5926fefa4e45a6d43f0a21ef9be1"
is_byokfalse
latency220
model_permaslug"mistralai/mistral-medium-3.1" 3/1/2001, 12:00:00 AM
provider_name"Mistral"
status200
api_type"completions"
id"gen-1771598091-AS0r0om9mZOj9Ix9JQzI"
upstream_id"f90e5926fefa4e45a6d43f0a21ef9be1"
total_cost0.0005356
cache_discount(null)
upstream_inference_cost0
provider_name"Mistral"

Evaluation details

Result Evaluator Details Meta Data
75.61% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
019
120
220
319
420
520
621
719
820
922