NC Bench
Overview
About
Tests
Categories
Models
Vendors
Compare
Run: 2026-10-07-01M4AVHVJFP7NGRD2G10HN5SSW
Run Details
Model:
Mistral Medium 3.5
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
3.0s
Cost:
$0.002319
Provider:
Mistral
Evaluation summary
Score
Evaluator
Details Link
29.90%
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 library fell silent as the clock struck midnight with an eerie, echoing chime through the dusty halls. Detective Harlow adjusted his coat, eyes scanning the shadowed shelves where secrets lurked behind gilded spines and timeworn leather. A single candle flickered on the mahogany desk, casting long, trembling shadows across the scattered papers and half-empty glass. The victim lay sprawled near the fireplace, a crimson stain blooming across his waistcoat like a grotesque, unfolding rose in the firelight. His monocle had rolled beneath the chair, glinting coldly as it caught the dim light, a silent witness to the night’s brutal events. A faint scent of lavender and gunpowder hung in the air, mingling with the metallic tang of blood and old parchment. Harlow knelt, his gloved fingers brushing the edge of a torn letter, its ink smeared as if by a hurried, trembling hand. The butler stood rigid by the door, his pale face betraying nothing, though his knuckles whitened around the silver tray he clutched. Outside, the wind howled through the oak trees, rattling the windows like a ghost demanding entry to the grim, unfolding drama within. Somewhere in the house, a floorboard creaked, and Harlow’s pulse quickened, knowing the killer might still be watching, waiting, hidden in plain sight.
created_at
"2026-10-07T09:36:43.608Z"
10/7/2026, 9:36:43 AM
model
"mistralai/mistral-medium-3.5-20260430"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
298
moderation_latency
(null)
generation_time
2936
tokens_prompt
46
tokens_completion
336
native_tokens_prompt
51
native_tokens_completion
299
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)
num_fetches
(null)
web_search_engine
(null)
origin
"https://ncbench.com/"
is_byok
false
finish_reason
"stop"
native_finish_reason
"stop"
service_tier
"default"
usage
0.002319
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer
(null)
request_id
"req-1791365803-HbGv8fs9DJEGBq4azC8Y"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1791365803-X9ZhywoyyNcfjq3JyjAk"
upstream_id
"ab32811bd276477387ae3221682bb96d"
provider_responses
0
endpoint_id
"d21d316f-d540-4718-b36e-3beff85d0cf9"
id
"ab32811bd276477387ae3221682bb96d"
is_byok
false
latency
289
model_permaslug
"mistralai/mistral-medium-3.5-20260430"
provider_name
"Mistral"
status
200
total_cost
0.002319
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Mistral"
response_cache_source_id
(null)
data_region
"global"
workspace_id
"97e315e5-d303-487d-83c1-83180e8a13d4"
Evaluation details
Result
Evaluator
Details
Meta Data
29.90%
Matches word count
n/a
neededClean
false
sentences
10
wordCounts
0
19
1
19
2
19
3
22
4
23
5
21
6
22
7
22
8
22
9
23