NC Bench
Overview
About
Tests
Models
Vendors
Run: 2026-02-19-01KHVP11BYG9A032NPCQPX8BWD
Run Details
Model:
Gemini 3.1 Pro (Preview)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
1m 2s
Cost:
$0.061348
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 20 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
Heavy rain washed the crimson blood across the dark cobblestone street as the distant thunder masked the approaching footsteps perfectly. Detective Vance stared down at the cold lifeless body of wealthy industrialist Arthur Pendelton lying awkwardly near a broken lamppost. A sharp silver dagger with an ornate handle protruded from his chest right above his expensive custom silk dinner jacket. Nobody could ever explain why the notoriously paranoid billionaire decided to walk through this dangerous neighborhood completely alone past midnight. Vance crouched quietly beside the victim and noticed a small torn piece of yellow paper clutched inside one stiff hand. The damp scrap contained merely three handwritten letters that would eventually unravel the greatest political conspiracy in modern city history. Sirens wailed wildly in the distance when a mysterious woman wearing a gorgeous velvet coat stepped out from the shadows. She blew smoke from her long cigarette while looking at the gruesome scene without showing any obvious emotion or fear. Before Vance could ask her name she simply smiled and pointed toward a bloody footprint leading into the dark alleyway.
created_at
"2026-02-19T19:29:00.131Z"
2/19/2026, 7:29:00 PM
model
"google/gemini-3.1-pro-preview-20260219"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3724
moderation_latency
(null)
generation_time
61971
tokens_prompt
46
tokens_completion
1636
native_tokens_prompt
38
native_tokens_completion
5106
native_tokens_completion_images
0
native_tokens_reasoning
4905
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
0.061348
router
(null)
provider_responses
0
endpoint_id
"2abf5677-0826-45d9-8470-3d62c31d54a1"
is_byok
false
latency
3724
model_permaslug
"google/gemini-3.1-pro-preview-20260219"
provider_name
"Google AI Studio"
status
200
api_type
"completions"
id
"gen-1771529340-rSpwINbk217RPDZzB2Yj"
upstream_id
(null)
total_cost
0.061348
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
9
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20
7
20
8
20