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Run: 2026-10-07-01M4AT0CZV4JFHNHS5NG729TJC
Run Details
Model:
Mistral Medium 3.5
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
2.2s
Cost:
$0.001832
Provider:
Mistral
Evaluation summary
Score
Evaluator
Details Link
14.51%
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 dusty shelves. Detective Harlow adjusted his glasses, scanning the dim room where shadows stretched like grasping, skeletal fingers. A single candle flickered on the mahogany desk, casting long, wavering shapes across the scattered, bloodstained papers. The victim lay sprawled near the fireplace, a silver letter opener buried deep in his motionless, pale chest. Thunder rumbled outside, shaking the stained-glass windows as rain began to lash against the ancient, creaking panes. Harlow knelt beside the body, noticing a torn scrap of fabric clutched tightly in the dead man’s stiff hand. The butler stood rigid by the door, his face unreadable, though his knuckles whitened around the brass doorknob. A faint scent of lavender lingered in the air, mingling with the metallic tang of fresh blood pooling on the Persian rug. Somewhere in the house, a floorboard groaned under the weight of unseen footsteps moving with deliberate, stealthy precision.
created_at
"2026-10-07T09:09:43.044Z"
10/7/2026, 9:09:43 AM
model
"mistralai/mistral-medium-3.5-20260430"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
265
moderation_latency
(null)
generation_time
2169
tokens_prompt
46
tokens_completion
269
native_tokens_prompt
51
native_tokens_completion
234
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
0.0018315
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer
(null)
request_id
"req-1791364183-399mNrm3yMUuyeo237yT"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1791364183-FgfYJoRPM61BB0ZZD4GC"
upstream_id
"2ce237eba02449378e1de261a07fddbe"
provider_responses
0
endpoint_id
"d21d316f-d540-4718-b36e-3beff85d0cf9"
id
"2ce237eba02449378e1de261a07fddbe"
is_byok
false
latency
265
model_permaslug
"mistralai/mistral-medium-3.5-20260430"
provider_name
"Mistral"
status
200
total_cost
0.0018315
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
14.51%
Matches word count
n/a
neededClean
false
sentences
9
wordCounts
0
18
1
16
2
17
3
18
4
17
5
19
6
18
7
22
8
18