Model

Gemini 2.5 Pro

Test

N-Length Sentences

Scenario

Write sentences with 20 words each

Run ID

2025-11-18-01KACP4493JNE44A7FKB04ECJG

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 Harding arrived at the grand manor as the clock struck midnight, while relentless, cold rain lashed against the windows. The butler, a grim statue of a man, showed him silently down the long, shadowed hallway of the old house. He entered the oak-paneled study where a dying fire cast long, dancing shadows across the expensive, ornate leather furniture. Lord Harrington was slumped facedown onto his immense mahogany desk, a single, dark crimson stain spreading across the blotter. An overturned crystal glass lay shattered on the floor beside the desk, its amber contents pooling into the Persian rug. The only sound in the suffocatingly silent room was the grandfather clock’s relentless, metronomic ticking from a far corner. Harding noted the serene, almost peaceful expression on the dead man's face, a detail that felt chillingly out of place.
created_at"2025-11-18T23:52:28.829331+00:00" Tuesday, November 18th, 2025 at 11:52:28 PM GMT+00:00
model"google/gemini-2.5-pro" 
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2109
moderation_latency(null)
generation_time15768
tokens_prompt42
tokens_completion799
native_tokens_prompt38
native_tokens_completion1858
native_tokens_completion_images0
native_tokens_reasoning1689
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" 
usage0.0186275
api_type"completions" 
id"gen-1763509932-ppAAG6L8sqDHdsBDEXlI" 
upstream_id(null)
total_cost0.0186275
cache_discount(null)
upstream_inference_cost0
provider_name"Google AI Studio" 

Evaluation details

Result Evaluator Details Meta Data
88.7580% Matches word count n/a
neededCleanfalse
sentences7
wordCounts
020
120
220
319
420
519
620