NC Bench
Overview
About
Tests
Categories
Models
Vendors
Compare
Run: 2026-10-07-01M4AVM11PDD81SBNZ2P6EPY4C
Run Details
Model:
Mistral Medium 3.5
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
1.9s
Cost:
$0.001262
Provider:
Mistral
Evaluation summary
Score
Evaluator
Details Link
33.55%
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 glasses, scanning the shadowed shelves where the victim’s body lay sprawled unnaturally. A single bloodstained letter opener glinted under the flickering gaslight, its handle carved with an intricate, unfamiliar crest. The butler’s trembling hands clutched a silver tray, his pale face betraying more than mere shock at the grim discovery. Whispers slithered between the gathered guests, each suspect’s alibi crumbling like the ancient parchment scattered near the corpse. Outside, the storm raged violently, the wind howling through broken windows as if mourning the library’s lost peace.
created_at
"2026-10-07T09:37:54.749Z"
10/7/2026, 9:37:54 AM
model
"mistralai/mistral-medium-3.5-20260430"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
333
moderation_latency
(null)
generation_time
1813
tokens_prompt
46
tokens_completion
190
native_tokens_prompt
51
native_tokens_completion
158
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
0.0012615
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer
(null)
request_id
"req-1791365874-U7SU86V8sIZ3LiR0yftb"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1791365874-iL7Yu2KHgHC5J1tYULFL"
upstream_id
"c936804d83dc45c5a99654194c80fc49"
provider_responses
0
endpoint_id
"38ef23a9-5cb3-46fa-85ec-7aed174f04eb"
id
"c936804d83dc45c5a99654194c80fc49"
is_byok
false
latency
333
model_permaslug
"mistralai/mistral-medium-3.5-20260430"
provider_name
"Mistral"
status
200
total_cost
0.0012615
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
33.55%
Matches word count
n/a
neededClean
false
sentences
6
wordCounts
0
19
1
16
2
18
3
20
4
18
5
18