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

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_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1825
moderation_latency(null)
generation_time15415
tokens_prompt42
tokens_completion740
native_tokens_prompt38
native_tokens_completion1817
native_tokens_completion_images0
native_tokens_reasoning1669
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
origin"https://ncbench.com/" 
is_byokfalse
finish_reason"stop" 
native_finish_reason"STOP" 
usage0.0182175
api_type"completions" 
id"gen-1763510084-ZhuHdkNAil628XtxQjTq" 
upstream_id(null)
total_cost0.0182175
cache_discount(null)
upstream_inference_cost0
provider_name"Google AI Studio" 

Evaluation details

Result Evaluator Details Meta Data
73.7687% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
019
119
220
319
420
519