NC Bench
Overview
About
Tests
Models
Model
Gemini 2.5 Pro
Test
N-Length Sentences
Scenario
Write sentences with 20 words each
Run ID
2025-11-18-01KACPAXT688GEA1NSKPV2BWEN
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 Miles Corbin arrived at the fog-shrouded Blackwood Manor just as the cold, relentless autumn rain began falling heavily. The ancient stone gargoyles seemed to weep black tears, their grotesque faces silently watching every single one of his movements. Flashing blue and red lights painted the dripping trees with an unnerving, almost psychedelic, and completely inappropriate carnival-like glow. A uniformed officer with a tired face and a poorly fitting raincoat met him at the colossal, imposing oak front door. “The body is in the library, on the expensive Persian rug, just as the hysterical housekeeper first reported finding it.” Corbin stepped inside, the chilling air thick with the metallic scent of blood and the faint, sweet perfume of decay. Sprawled on the floor was Lord Alistair Blackwood, a man known for his vast fortune and even vaster collection of enemies.
created_at
"2025-11-18T23:56:09.011481+00:00"
Tuesday, November 18th, 2025 at 11:56:09 PM GMT+00:00
model
"google/gemini-2.5-pro"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3413
moderation_latency
(null)
generation_time
13197
tokens_prompt
42
tokens_completion
723
native_tokens_prompt
38
native_tokens_completion
1486
native_tokens_completion_images
0
native_tokens_reasoning
1314
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
0.0149075
api_type
"completions"
id
"gen-1763510155-7BUqILuGMFxfKeAPk82j"
upstream_id
(null)
total_cost
0.0149075
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Google AI Studio"
Evaluation details
Result
Evaluator
Details
Meta Data
63.6599%
Matches word count
n/a
neededClean
false
sentences
6
wordCounts
0
20
1
20
2
19
3
21
4
40
5
21