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Run: 2026-02-25-01KJ94Y7MGWCCXH0EEDB8A9SDF
Run Details
Model:
Gemini 2.5 Flash (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
6.0s
Cost:
$0.003456
Provider:
Google AI Studio
Evaluation summary
Score
Evaluator
Details Link
86.70%
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
Rain lashed hard against the old manor windows violently outside. Elara shivered deeply, clutching a flickering silver candlestick tightly. The immense house felt colder, heavier, utterly desolate tonight. A strange silence replaced the expected cheerful household sounds there. She moved through the gallery, anxiety churning low in her gut. Something was wrong; a primal fear held her breath captive. Then she saw it, a dark shape on the grand study floor. Her breath hitched sharply, a strangled gasp escaping her dry throat. Lord Ashworth lay still, blood staining his expensive tweed jacket. His eyes were wide open, fixed blankly toward the high ceiling. A silver paperknife protruded terribly from his immaculate white shirt. The ornate desk lamp lay shattered beside his outstretched hand. Elara dropped the heavy candlestick, screaming shrilly into the dark. The chilling sound echoed endlessly through the vast, empty halls. She stumbled backward, fumbling for her old, heavy, mobile phone.
created_at
"2026-02-25T00:59:44.661Z"
2/25/2026, 12:59:44 AM
model
"google/gemini-2.5-flash"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1232
moderation_latency
(null)
generation_time
5955
tokens_prompt
46
tokens_completion
727
native_tokens_prompt
38
native_tokens_completion
1378
native_tokens_completion_images
0
native_tokens_reasoning
1179
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
0.0034564
router
(null)
provider_responses
0
endpoint_id
"16c01e26-9b91-4d22-b487-ed35634b017d"
is_byok
false
latency
1232
model_permaslug
"google/gemini-2.5-flash"
provider_name
"Google AI Studio"
status
200
api_type
"completions"
id
"gen-1771981184-2enuew965I94GIHXRooA"
upstream_id
(null)
total_cost
0.0034564
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Google AI Studio"
Evaluation details
Result
Evaluator
Details
Meta Data
86.70%
Matches word count
n/a
neededClean
false
sentences
15
wordCounts
0
10
1
9
2
9
3
10
4
11
5
10
6
12
7
11
8
10
9
11
10
10
11
10
12
10
13
10
14
10