NC Bench
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Run: 2026-02-19-01KHVP09Y8RWM9SWRMK70CRZ22
Run Details
Model:
Gemini 3.1 Pro (Preview)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
43.8s
Cost:
$0.048868
Provider:
Google AI Studio
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 10 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
Thunder rattled the dusty windows of the old manor house. Detective Vance stepped into the dimly lit, freezing grand library. Lord Blackwood rested awkwardly upon his expensive red Persian rug. A silver dagger protruded deeply from his motionless, bloody chest. Three frightened suspects waited cautiously outside the heavy oak doors. Vance slowly knelt down beside the wealthy, recently murdered aristocrat. Flickering candlelight illuminated the intricate golden handle of the weapon. A torn piece of parchment rested near the pale fingertips. Someone had scrawled a threatening message using dark crimson ink. The strange note promised further violent retribution before midnight struck. Suddenly, the grandfather clock began chiming loudly in the hallway. Eleven hollow tolls echoed throughout the completely empty, silent mansion. Only one hour remained until another innocent person would die. Vance pocketed the terrifying note and stood up very slowly. The true investigation of this terrible crime had just begun.
created_at
"2026-02-19T19:28:36.45Z"
2/19/2026, 7:28:36 PM
model
"google/gemini-3.1-pro-preview-20260219"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3723
moderation_latency
(null)
generation_time
43033
tokens_prompt
46
tokens_completion
1346
native_tokens_prompt
38
native_tokens_completion
4066
native_tokens_completion_images
0
native_tokens_reasoning
3888
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
0.048868
router
(null)
provider_responses
0
endpoint_id
"2abf5677-0826-45d9-8470-3d62c31d54a1"
is_byok
false
latency
3723
model_permaslug
"google/gemini-3.1-pro-preview-20260219"
provider_name
"Google AI Studio"
status
200
api_type
"completions"
id
"gen-1771529316-QEORiOXj14s1W8dHYMgz"
upstream_id
(null)
total_cost
0.048868
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Google AI Studio"
Evaluation details
Result
Evaluator
Details
Meta Data
100.00%
Matches word count
n/a
neededClean
false
sentences
15
wordCounts
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10
8
10
9
10
10
10
11
10
12
10
13
10
14
10