NC Bench
Overview
About
Tests
Models
Model
Gemini 2.5 Pro
Test
N-Length Sentences
Scenario
Write sentences with 20 words each
Run ID
2025-11-18-01KACP8S45FN7EKGKG3EKVPD9R
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 grandfather clock in the hall chimed midnight, its solemn, heavy tones echoing through the grand and silent library. The elderly butler, Jennings, entered the room on soft-soled shoes, carrying a silver tray with one waiting nightcap. He saw his master, Lord Ashworth, slumped low in the high-backed leather armchair beside the cold, dark, empty hearth. A crystal glass of brandy had tipped, its amber liquid a dark, spreading stain upon the priceless Aubusson rug. Beside the lord's limp hand, a single ivory chess piece, the white king, had been carefully placed on its side. A creeping dread filled the aging butler as he noticed his master’s completely unmoving chest and vacant, staring eyes.
created_at
"2025-11-18T23:55:00.825647+00:00"
Tuesday, November 18th, 2025 at 11:55:00 PM GMT+00:00
model
"google/gemini-2.5-pro"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1825
moderation_latency
(null)
generation_time
15415
tokens_prompt
42
tokens_completion
740
native_tokens_prompt
38
native_tokens_completion
1817
native_tokens_completion_images
0
native_tokens_reasoning
1669
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
0.0182175
api_type
"completions"
id
"gen-1763510084-ZhuHdkNAil628XtxQjTq"
upstream_id
(null)
total_cost
0.0182175
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Google AI Studio"
Evaluation details
Result
Evaluator
Details
Meta Data
73.7687%
Matches word count
n/a
neededClean
false
sentences
6
wordCounts
0
19
1
19
2
20
3
19
4
20
5
19