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Run: 2026-02-20-01KHXQK515MZXQWFM5JSTY8ZT0
Run Details
Model:
Mistral Medium 3.1
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
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
Messages
Meta
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_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
220
moderation_latency
(null)
generation_time
4687
tokens_prompt
46
tokens_completion
332
native_tokens_prompt
39
native_tokens_completion
260
native_tokens_completion_images
(null)
native_tokens_reasoning
0
native_tokens_cached
0
num_media_prompt
(null)
num_input_audio_prompt
(null)
num_media_completion
0
num_search_results
(null)
origin
"https://ncbench.com/"
is_byok
false
finish_reason
"stop"
native_finish_reason
"stop"
usage
0.0005356
router
(null)
provider_responses
0
endpoint_id
"13c5002b-8c5b-490c-8a5f-52ec0242804f"
id
"f90e5926fefa4e45a6d43f0a21ef9be1"
is_byok
false
latency
220
model_permaslug
"mistralai/mistral-medium-3.1"
3/1/2001, 12:00:00 AM
provider_name
"Mistral"
status
200
api_type
"completions"
id
"gen-1771598091-AS0r0om9mZOj9Ix9JQzI"
upstream_id
"f90e5926fefa4e45a6d43f0a21ef9be1"
total_cost
0.0005356
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Mistral"
Evaluation details
Result
Evaluator
Details
Meta Data
75.61%
Matches word count
n/a
neededClean
false
sentences
10
wordCounts
0
19
1
20
2
20
3
19
4
20
5
20
6
21
7
19
8
20
9
22