Model

Gemini 2.5 Pro

Test

N-Length Sentences

Scenario

Write sentences with 20 words each

Run ID

2025-11-18-01KACP4QYS8Y9ME0V06GMWYWJC

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 Inspector Miles Corbin surveyed the opulent room, his sharp, observant eyes missing absolutely nothing in the flickering firelight. The master of the house, Lord Alistair Harrington, was slumped lifelessly in his favorite high-backed, green leather reading chair. A single, perfect, crimson stain blossomed like a dark, ghastly rose upon the starched white front of his shirt. An overturned crystal glass lay shattered on the expensive Persian rug, its amber liquid seeping slowly into the intricate fibers. Corbin noted the strange absence of a struggle, despite the undeniable, final evidence of extremely sudden and very personal violence. In the shadowed doorway, the pale, frightened faces of the assembled family members watched his every single calculated, deliberate move.
created_at"2025-11-18T23:52:47.90974+00:00" Tuesday, November 18th, 2025 at 11:52:47 PM GMT+00:00
model"google/gemini-2.5-pro" 
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2428
moderation_latency(null)
generation_time14382
tokens_prompt42
tokens_completion703
native_tokens_prompt38
native_tokens_completion1588
native_tokens_completion_images0
native_tokens_reasoning1440
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" 
usage0.0159275
api_type"completions" 
id"gen-1763509952-LjjY6qzxBunifqqvXSZ7" 
upstream_id(null)
total_cost0.0159275
cache_discount(null)
upstream_inference_cost0
provider_name"Google AI Studio" 

Evaluation details

Result Evaluator Details Meta Data
86.8844% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
019
120
219
320
420
520