Model

Gemini 2.5 Pro

Test

N-Length Sentences

Scenario

Write sentences with 20 words each

Run ID

2025-11-18-01KACP4SQ15TYE5BKAEVXG6J1M

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
Rain lashed furiously against the leaded glass as Detective Harding finally stepped into the grand, oppressively silent Blackwood manor. A stoic, white-gloved butler guided him through the shadowed hallway towards the heavy, oak doors of the large library. There, slumped within a crimson wingback chair by the crackling fire, was the still and lifeless body of Alistair Blackwood. A single, dark stain spread across the starched white front of his shirt, just above his silent, unbeating heart. An overturned whiskey tumbler lay on the mahogany table, its amber liquid staining the pages of an old, leather-bound book. The detective scanned the meticulously tidy room, where only death itself seemed to be so terribly out of its place.
created_at"2025-11-18T23:52:50.242303+00:00" Tuesday, November 18th, 2025 at 11:52:50 PM GMT+00:00
model"google/gemini-2.5-pro" 
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2778
moderation_latency(null)
generation_time15656
tokens_prompt42
tokens_completion854
native_tokens_prompt38
native_tokens_completion1657
native_tokens_completion_images0
native_tokens_reasoning1509
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" 
usage0.0166175
api_type"completions" 
id"gen-1763509954-F8LVDzrFz09k7flY3aRY" 
upstream_id(null)
total_cost0.0166175
cache_discount(null)
upstream_inference_cost0
provider_name"Google AI Studio" 

Evaluation details

Result Evaluator Details Meta Data
80.3265% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
019
120
220
319
421
520