NC Bench
Overview
About
Tests
Models
Model
Gemini 2.5 Pro
Test
N-Length Sentences
Scenario
Write sentences with 20 words each
Run ID
2025-11-18-01KACPCE1D540XY5X0HXDQHX9D
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
Detective Inspector Miles Corbin arrived at the desolate manor as the relentless autumn rain lashed against his worn trench coat. The great oak door creaked shut behind him, plunging the vast, empty entrance hall into an unnervingly profound silence. He followed the stoic butler through a long corridor of portraits, all towards the heavy mahogany doors of the library. Lord Harrington Ashworth was slumped sideways in his favourite high-backed leather chair, a man who had read his final chapter. An overturned crystal tumbler had soaked a dark, spreading stain of expensive brandy into the priceless, antique Persian rug. Yet, a neatly folded piece of expensive stationery was placed deliberately within the dead man’s cold, unmoving left hand.
created_at
"2025-11-18T23:57:00.584272+00:00"
Tuesday, November 18th, 2025 at 11:57:00 PM GMT+00:00
model
"google/gemini-2.5-pro"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2699
moderation_latency
(null)
generation_time
15708
tokens_prompt
42
tokens_completion
887
native_tokens_prompt
38
native_tokens_completion
1811
native_tokens_completion_images
0
native_tokens_reasoning
1676
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
0.0181575
api_type
"completions"
id
"gen-1763510204-4Cq6yYUYr77GhjeltdrL"
upstream_id
(null)
total_cost
0.0181575
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
20
1
19
2
20
3
21
4
19
5
19