NC Bench
Overview
About
Tests
Models
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
Messages
Meta
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_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2953
moderation_latency
(null)
generation_time
21043
tokens_prompt
42
tokens_completion
947
native_tokens_prompt
38
native_tokens_completion
2381
native_tokens_completion_images
0
native_tokens_reasoning
2227
native_tokens_cached
0
num_media_prompt
(null)
num_input_audio_prompt
(null)
num_media_completion
0
num_search_results
(null)
origin
"https://ncbench.com/"
is_byok
false
finish_reason
"stop"
native_finish_reason
"STOP"
usage
0.0238575
api_type
"completions"
id
"gen-1763510094-O3F01NEIhPefYvitO9Mw"
upstream_id
(null)
total_cost
0.0238575
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Google AI Studio"
Evaluation details
Result
Evaluator
Details
Meta Data
40.4590%
Matches word count
n/a
neededClean
false
sentences
7
wordCounts
0
19
1
18
2
19
3
19
4
18
5
19
6
18