Model

Gemini 3 Flash (Preview)

Test

N-Length Sentences

Scenario

Write sentences with 20 words each

Run ID

2026-02-08-01KGYXCNJNGXGKN4E5PFQQGDEQ

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 grandfather clock struck midnight while a heavy fog crawled over the manicured lawn of the ancient and silent country estate. Inside the library, Arthur Penhaligon slumped over his mahogany desk with a silver letter opener protruding from his rigid, cold spine. Rain lashed against the leaded windowpanes as the scent of expensive brandy mingled with the metallic tang of fresh blood. A single silk glove lay abandoned near the hearth, its white fabric stained by a splash of deep, crimson wine. Somewhere in the shadows of the long hallway, a floorboard creaked beneath the weight of a pair of stealthy boots. The killer paused to listen for any signs of movement before slipping through the heavy oak doors into the night. No one heard the muffled scream that echoed briefly through the empty corridors of the house during the violent storm. Now the only sound remaining was the rhythmic ticking of the clock marking the passage of a very long night.
created_at"2026-02-08T15:19:45.322011+00:00" Sunday, February 8th, 2026 at 3:19:45 PM GMT+00:00
model"google/gemini-3-flash-preview-20251217" 
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency739
moderation_latency(null)
generation_time1730
tokens_prompt35
tokens_completion192
native_tokens_prompt38
native_tokens_completion184
native_tokens_completion_images0
native_tokens_reasoning0
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" 
usage0.000571
router(null)
provider_responses
0
status200
is_byokfalse
latency739
endpoint_id"6e82f652-2693-4b60-bbe0-7362d6e345f0" 
provider_name"Google AI Studio" 
model_permaslug"google/gemini-3-flash-preview-20251217" 
api_type"completions" 
id"gen-1770563982-F0sf81aUd97PZBZL0vWi" 
upstream_id(null)
total_cost0.000571
cache_discount(null)
upstream_inference_cost0
provider_name"Google AI Studio" 

Evaluation details

Result Evaluator Details Meta Data
90.1633% Matches word count n/a
neededCleanfalse
sentences8
wordCounts
021
121
220
320
420
520
620
720