NC Bench
Overview
About
Tests
Models
Vendors
Run: 2026-02-19-01KHVPC3MZ7HA7Q9A3R1NQ7BEF
Run Details
Model:
Gemini 3.1 Pro (Preview)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
51.0s
Cost:
$0.047608
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
Thunder suddenly shattered the midnight silence, echoing through the desolate halls of the abandoned mansion where the bloody corpse lay. Detective Arthur Vance stepped slowly over the shattered glass, his trench coat dripping cold rainwater onto the faded Persian carpet. Lord Blackwood stared blindly at the vaulted ceiling, a solid gold dagger protruding from his velvet vest in grotesque mockery. A single crimson rose rested gently upon the lifeless chest, placed there deliberately by somebody who loved and hated him. Lightning flashed through the tall windows, casting long, menacing shadows across the lavish room filled with dangerous, unspoken family secrets. Vance knelt beside the wealthy aristocrat, pulling a magnifying glass from his pocket to examine the strange metallic murder weapon. He noticed a small piece of parchment clutched tightly inside the dead fingers, containing a terrifying and highly cryptic message. The killer was clearly still trapped somewhere inside this sprawling estate, waiting patiently for another chance to strike again tonight.
created_at
"2026-02-19T19:35:02.911Z"
2/19/2026, 7:35:02 PM
model
"google/gemini-3.1-pro-preview-20260219"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3715
moderation_latency
(null)
generation_time
50846
tokens_prompt
46
tokens_completion
1483
native_tokens_prompt
38
native_tokens_completion
3961
native_tokens_completion_images
0
native_tokens_reasoning
3779
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
0.047608
router
(null)
provider_responses
0
endpoint_id
"2abf5677-0826-45d9-8470-3d62c31d54a1"
is_byok
false
latency
3715
model_permaslug
"google/gemini-3.1-pro-preview-20260219"
provider_name
"Google AI Studio"
status
200
api_type
"completions"
id
"gen-1771529702-69Mn8FIz2kJhGR4ZnijY"
upstream_id
(null)
total_cost
0.047608
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
8
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20
7
20