Model

Gemini 2.5 Pro

Test

N-Length Sentences

Scenario

Write sentences with 20 words each

Run ID

2025-11-18-01KACP92W2EGJC44M7HTW0DA9H

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 old housekeeper entered the book-lined study, her sensible shoes making absolutely no sound on the Persian rug. Lord Ashworth was sitting perfectly still in his chair, facing the cold ashes within the room’s marble fireplace. She assumed the master had simply fallen asleep while reading one of his many valuable, leather-bound first editions. But a dark crimson stain had blossomed across the crisp white front of the wealthy man's very expensive shirt. A silver letter opener with a tarnished, ornate handle protruded from the center of his unmoving, silent chest. A half-empty whiskey tumbler lay on its side, its amber contents spilled across some very important legal documents. The housekeeper opened her mouth wide to scream, but only a dreadful, horrifying silence managed to escape her.
created_at"2025-11-18T23:55:16.17445+00:00" Tuesday, November 18th, 2025 at 11:55:16 PM GMT+00:00
model"google/gemini-2.5-pro" 
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2953
moderation_latency(null)
generation_time21043
tokens_prompt42
tokens_completion947
native_tokens_prompt38
native_tokens_completion2381
native_tokens_completion_images0
native_tokens_reasoning2227
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" 
usage0.0238575
api_type"completions" 
id"gen-1763510094-O3F01NEIhPefYvitO9Mw" 
upstream_id(null)
total_cost0.0238575
cache_discount(null)
upstream_inference_cost0
provider_name"Google AI Studio" 

Evaluation details

Result Evaluator Details Meta Data
40.4590% Matches word count n/a
neededCleanfalse
sentences7
wordCounts
019
118
219
319
418
519
618