NC Bench
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Run: 2026-02-20-01KHXQ9W3H9HZX8V35YN20ZQ1A
Run Details
Model:
Mistral Medium 3.1
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
2.7s
Cost:
$0.000302
Provider:
Mistral
Evaluation summary
Score
Evaluator
Details Link
72.28%
Matches word count
(details)
Model input
User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 10 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 heavy with unseen threats. Rain tapped against windows while shadows stretched across the marble floors. A single candle flickered weakly, casting eerie light upon the portrait. The butler’s stiff posture betrayed nothing as he announced dinner’s arrival. Guests exchanged nervous glances, each wondering who would vanish before dawn broke. Footsteps echoed down the hall, but no one dared turn around. The host’s laughter rang hollow, like glass shattering in silent darkness. A scream pierced the night—then silence swallowed every trembling breath. Blood seeped beneath the study door, staining the rug crimson. Detective Mercer adjusted his gloves, knowing the worst was yet coming.
created_at
"2026-02-20T14:29:47.258Z"
2/20/2026, 2:29:47 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
324
moderation_latency
(null)
generation_time
2611
tokens_prompt
46
tokens_completion
192
native_tokens_prompt
39
native_tokens_completion
143
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
0.0003016
router
(null)
provider_responses
0
endpoint_id
"13c5002b-8c5b-490c-8a5f-52ec0242804f"
id
"58e68cdc2132451a92f9d792417a759c"
is_byok
false
latency
324
model_permaslug
"mistralai/mistral-medium-3.1"
3/1/2001, 12:00:00 AM
provider_name
"Mistral"
status
200
api_type
"completions"
id
"gen-1771597787-MrGso9jFWwXAP2aqBW2E"
upstream_id
"58e68cdc2132451a92f9d792417a759c"
total_cost
0.0003016
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Mistral"
Evaluation details
Result
Evaluator
Details
Meta Data
72.28%
Matches word count
n/a
neededClean
false
sentences
10
wordCounts
0
11
1
11
2
11
3
11
4
12
5
11
6
11
7
11
8
10
9
11