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Run: 2026-02-25-01KJ95ENMN3PS28EEQFKQJKYJ8
Run Details
Model:
Gemini 2.5 Flash (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
7.4s
Cost:
$0.003899
Provider:
Google AI Studio
Evaluation summary
Score
Evaluator
Details Link
74.96%
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 house stood silent, cloaked in heavy fog. Rain beat hard against the grimy windowpanes outside. Detective Inspector Thorne shivered, clutching his worn trench coat. His breath plumed white in the mansion's chill air. A cryptic phone call summoned him here past midnight. The grand oak door creaked open, revealing dusty gloom. Footsteps echoed hollowly on the polished marble floor inside. He followed the faint scent of copper and decay. A crystal chandelier glittered dimly above a slumped figure. Lady Beatrice Sterling lay sprawled, face frozen stark. A single crimson stain bloomed brightly on her silk dress. Her vacant eyes stared up at the frescoed ceiling. Thorne knelt carefully, checking for any signs of life. He felt nothing but cold stiffness beneath his gloved hand. Her sapphire necklace was missing from her pale, thin neck. This was no accident; someone had paid a deadly visit. Forensics would arrive soon, but clues seemed painfully scarce. The killer had vanished into the oppressive, dark night.
created_at
"2026-02-25T01:08:43.291Z"
2/25/2026, 1:08:43 AM
model
"google/gemini-2.5-flash"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1298
moderation_latency
(null)
generation_time
7354
tokens_prompt
46
tokens_completion
1045
native_tokens_prompt
38
native_tokens_completion
1555
native_tokens_completion_images
0
native_tokens_reasoning
1353
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
0.0038989
router
(null)
provider_responses
0
endpoint_id
"16c01e26-9b91-4d22-b487-ed35634b017d"
is_byok
false
latency
1298
model_permaslug
"google/gemini-2.5-flash"
provider_name
"Google AI Studio"
status
200
api_type
"completions"
id
"gen-1771981723-pJ3QVUasQezJsHEFolld"
upstream_id
(null)
total_cost
0.0038989
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Google AI Studio"
Evaluation details
Result
Evaluator
Details
Meta Data
74.96%
Matches word count
n/a
neededClean
false
sentences
18
wordCounts
0
9
1
8
2
9
3
9
4
9
5
9
6
9
7
9
8
9
9
8
10
10
11
9
12
9
13
10
14
10
15
10
16
9
17
9