NC Bench
Overview
About
Tests
Categories
Models
Vendors
Compare
Run: 2026-10-07-01M4AV1SH1KAKE74E47GZ0T823
Run Details
Model:
Mistral Large 4.0 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
41.9s
Cost:
$0.010461
Provider:
Mistral
Evaluation summary
Score
Evaluator
Details Link
100.00%
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 autumn wind howled through the ancient oak trees surrounding the Blackwood Manor as darkness fell completely upon the village. Inspector Mara stood alone on the winding cobblestone path, her long black coat flapping wildly in the freezing September storm. She had received the urgent telegram three hours ago warning her about the murder discovered in the dark east wing. The victim was Lord Blackwood himself, found slumped over his mahogany desk with blood staining the expensive white Persian rug. A single candelabra lay shattered nearby, its crystal pieces scattered across the hardwood floor like diamonds on expensive black velvet. Mara knelt beside the cold body, her gloved hand hovering over the pale wrist checking desperately for any faint pulse. Nothing, only the silence of the dead and the ticking clock on the mantelpiece above the large cold stone fireplace. She noticed the peculiar symbol carved into the desk surface, a crimson spiral that seemed to pulse with hidden meaning. Three suspects waited in the library, their dark eyes avoiding hers while the rain lashed against the tall Gothic windows. The game had begun, and only one of them could be lying about their whereabouts during the storm last night.
created_at
"2026-10-07T09:27:57.225Z"
10/7/2026, 9:27:57 AM
model
"mistralai/mistral-large-4-0-20261006"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1939
moderation_latency
(null)
generation_time
41835
tokens_prompt
46
tokens_completion
3737
native_tokens_prompt
38
native_tokens_completion
4993
native_tokens_completion_images
(null)
native_tokens_reasoning
3429
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
0.01046121
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer
(null)
request_id
"req-1791365277-9w9H3gcwMt99mstR2HGG"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1791365277-pTYS49uwWV6JD6q3G5GY"
upstream_id
"87d17e2016814f179ba228fd338f90b7"
provider_responses
0
endpoint_id
"19b3b5d7-23f6-4b63-8109-64a6cc37d996"
id
"87d17e2016814f179ba228fd338f90b7"
is_byok
false
latency
574
model_permaslug
"mistralai/mistral-large-4-0-20261006"
provider_name
"Mistral"
status
200
total_cost
0.01046121
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
100.00%
Matches word count
n/a
neededClean
false
sentences
10
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20
7
20
8
20
9
20