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Run: 2026-02-25-01KJ958SDREQ4KS1D6SGEZMBPZ
Run Details
Model:
Gemini 2.5 Flash (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
7.0s
Cost:
$0.003284
Provider:
Google AI Studio
Evaluation summary
Score
Evaluator
Details Link
86.28%
Matches word count
(details)
Model input
User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 10 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
The old mansion loomed, silent against the winter night sky. Detective Miles stood outside, his breath pluming in the cold air. A frantic call reported something terribly wrong within the dark walls. He pushed open the heavy oak door; it groaned low. Darkness enveloped the grand foyer, thick and deeply disquieting. Dust motes danced in the lone beam of his powerful flashlight. A faint, metallic scent pricked at the detective's keen nostrils. He followed the smell, ascending the wide, creaking marble staircase. Each step echoed loudly, amplifying the mansion's oppressive stillness. The scent grew stronger, leading him to a gilded bedroom door. Hesitantly, Miles turned the cold brass knob, then pushed it. Crimson liquid stained the plush carpet, spreading slowly outward there. Sir Reginald Blackwood lay sprawled, his eyes staring blankly upward. A silver letter opener was plunged deep into his still chest. Blood crusted around the hilt, a gruesome, horrifying, silent testament. The room held a chill beyond the winter night's cold touch. Miles’ gloved hand reached slowly for his radio microphone.
created_at
"2026-02-25T01:05:30.557Z"
2/25/2026, 1:05:30 AM
model
"google/gemini-2.5-flash"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2427
moderation_latency
(null)
generation_time
7007
tokens_prompt
46
tokens_completion
800
native_tokens_prompt
38
native_tokens_completion
1309
native_tokens_completion_images
0
native_tokens_reasoning
1086
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
0.0032839
router
(null)
provider_responses
0
endpoint_id
"16c01e26-9b91-4d22-b487-ed35634b017d"
is_byok
false
latency
2427
model_permaslug
"google/gemini-2.5-flash"
provider_name
"Google AI Studio"
status
200
api_type
"completions"
id
"gen-1771981530-JgCvDR6q30301jaqYA2O"
upstream_id
(null)
total_cost
0.0032839
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Google AI Studio"
Evaluation details
Result
Evaluator
Details
Meta Data
86.28%
Matches word count
n/a
neededClean
false
sentences
17
wordCounts
0
10
1
11
2
11
3
10
4
9
5
11
6
10
7
10
8
9
9
11
10
10
11
10
12
10
13
11
14
10
15
11
16
9