NC Bench
Overview
About
Tests
Models
Model
Gemini 2.5 Pro
Test
N-Length Sentences
Scenario
Write sentences with 20 words each
Run ID
2025-11-18-01KACP9G2FFTF2TX1BCV98C476
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
Dust motes danced lazily in the single beam of moonlight slicing through the vast, silent, and mahogany-lined library. Lord Ashworth was slumped over his antique desk, his unseeing eyes reflecting the hundreds of leather-bound spines on shelves. A silver letter opener, its ornate handle gleaming, protruded from the starched white collar of his formal evening shirt. Inspector Miles surveyed the grim tableau, his expression unreadable as he took in every single detail of the room. Beside the victim's cold hand, a single, flawless white rose lay on a page of the ancient, open book.
created_at
"2025-11-18T23:55:23.112141+00:00"
Tuesday, November 18th, 2025 at 11:55:23 PM GMT+00:00
model
"google/gemini-2.5-pro"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2350
moderation_latency
(null)
generation_time
14232
tokens_prompt
42
tokens_completion
691
native_tokens_prompt
38
native_tokens_completion
1499
native_tokens_completion_images
0
native_tokens_reasoning
1380
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
0.0150375
api_type
"completions"
id
"gen-1763510108-CDoiffJH9vBLNo630Bug"
upstream_id
(null)
total_cost
0.0150375
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Google AI Studio"
Evaluation details
Result
Evaluator
Details
Meta Data
68.5225%
Matches word count
n/a
neededClean
false
sentences
5
wordCounts
0
19
1
20
2
19
3
19
4
19