Model

Gemini 2.5 Pro

Test

N-Length Sentences

Scenario

Write sentences with 20 words each

Run ID

2025-11-18-01KACPCA02J1S4824CW767W061

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
A deep, suffocating silence had fallen upon the study, clinging to the heavy velvet drapes like a funeral shroud. Detective Harding took in the scene, his world-weary eyes missing no details of the chilling tableau laid out before him. Alistair Finch, the renowned tycoon, was slumped lifelessly over his grand mahogany desk, a testament to sudden, violent death. A pool of blackest ink had bled across a half-written letter, obscuring the unsent words for all of eternity. The grandfather clock in the corner had stopped ticking, its golden hands frozen forever at the precise stroke of midnight. A single French window stood ajar, letting in the chilling night air that whispered secrets among the towering bookshelves. This was no simple robbery gone wrong; this elegant room was a pristine stage meticulously set for a well-planned murder.
created_at"2025-11-18T23:56:57.021064+00:00" Tuesday, November 18th, 2025 at 11:56:57 PM GMT+00:00
model"google/gemini-2.5-pro" 
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2138
moderation_latency(null)
generation_time16150
tokens_prompt42
tokens_completion903
native_tokens_prompt38
native_tokens_completion1848
native_tokens_completion_images0
native_tokens_reasoning1685
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" 
usage0.0185275
api_type"completions" 
id"gen-1763510200-ubr2jiHYzD9US8dgybKN" 
upstream_id(null)
total_cost0.0185275
cache_discount(null)
upstream_inference_cost0
provider_name"Google AI Studio" 

Evaluation details

Result Evaluator Details Meta Data
71.8950% Matches word count n/a
neededCleanfalse
sentences7
wordCounts
019
121
219
320
420
519
621