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

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_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3413
moderation_latency(null)
generation_time13197
tokens_prompt42
tokens_completion723
native_tokens_prompt38
native_tokens_completion1486
native_tokens_completion_images0
native_tokens_reasoning1314
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" 
usage0.0149075
api_type"completions" 
id"gen-1763510155-7BUqILuGMFxfKeAPk82j" 
upstream_id(null)
total_cost0.0149075
cache_discount(null)
upstream_inference_cost0
provider_name"Google AI Studio" 

Evaluation details

Result Evaluator Details Meta Data
63.6599% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
020
120
219
321
440
521