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Run: 2026-09-25-01M3CKHVRVYA33SYFHSNZCXF1R
Run Details
Model:
Mistral Medium 3.5 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
2.8s
Cost:
$0.002034
Provider:
Mistral
Evaluation summary
Score
Evaluator
Details Link
51.23%
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 silver letter opener buried deep in his chest, his face frozen in shock. Blood pooled darkly on the Persian rug, its intricate patterns now marred by the slow, creeping stain of violence. Footsteps echoed faintly from the upper balcony, but no one appeared when Harlow called out into the suffocating stillness. The air smelled of old books, cigar smoke, and something metallic that clung to the back of his throat. A torn page from a rare manuscript fluttered to the floor, its edges singed as if hastily ripped from a burning book. Harlow knelt beside the body, noticing a single monogrammed cufflink clutched tightly in the dead man’s stiffened fingers. The library doors were locked from the inside, yet the window latch hung open, swaying gently in the cold night breeze.
created_at
"2026-09-25T15:39:42.24Z"
9/25/2026, 3:39:42 PM
model
"mistralai/mistral-medium-3.5-20260430"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
385
moderation_latency
(null)
generation_time
2816
tokens_prompt
46
tokens_completion
308
native_tokens_prompt
51
native_tokens_completion
261
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
0.002034
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer
(null)
request_id
"req-1790350782-v6WXwKrXqnZIJ9DPbslk"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1790350782-DhtDHOGpXxJLsYQOWxY8"
upstream_id
"53225cc6ce0447e8a2e088ac24b78dbf"
provider_responses
0
endpoint_id
"38ef23a9-5cb3-46fa-85ec-7aed174f04eb"
id
"53225cc6ce0447e8a2e088ac24b78dbf"
is_byok
false
latency
385
model_permaslug
"mistralai/mistral-medium-3.5-20260430"
provider_name
"Mistral"
status
200
total_cost
0.002034
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
51.23%
Matches word count
n/a
neededClean
false
sentences
10
wordCounts
0
19
1
19
2
19
3
21
4
19
5
19
6
19
7
22
8
18
9
21