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Run: 2026-02-25-01KJ94KN29F475YZVCCSW4QEZ7
Run Details
Model:
Gemini 2.5 Flash (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
6.7s
Cost:
$0.003719
Provider:
Google AI Studio
Evaluation summary
Score
Evaluator
Details Link
0.12%
Matches word count
(details)
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
Detective Miles Corbin pushed open the heavy oak doors, entering the grand, silent, opulent foyer just now. A uniformed officer stood by the staircase, his face grim, awaiting further instruction solemnly there. He gestured toward the drawing room where the ghastly discovery had been made only hours ago. Corbin felt the familiar knot tighten in his stomach, a premonition of darkness always arriving soon. The smell of expensive perfume and something metallic assailed his senses very quickly inside here. Lord Harrington lay sprawled beside the antique fireplace, his silk smoking jacket stained dark now. A heavy bronze statue, a fallen angel, rested dangerously close to his lifeless head there. The room itself appeared undisturbed, displaying no signs of a struggle whatsoever, quite surprisingly. "An inside job," Corbin murmured, his gaze sweeping over the silent, opulent surroundings carefully. Who among these gilded walls possessed such a cold, calculating heart and motive, he wondered?
created_at
"2026-02-25T00:53:57.967Z"
2/25/2026, 12:53:57 AM
model
"google/gemini-2.5-flash"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1228
moderation_latency
(null)
generation_time
6619
tokens_prompt
46
tokens_completion
943
native_tokens_prompt
38
native_tokens_completion
1483
native_tokens_completion_images
0
native_tokens_reasoning
1301
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
0.0037189
router
(null)
provider_responses
0
endpoint_id
"16c01e26-9b91-4d22-b487-ed35634b017d"
is_byok
false
latency
1228
model_permaslug
"google/gemini-2.5-flash"
provider_name
"Google AI Studio"
status
200
api_type
"completions"
id
"gen-1771980837-Ldgi14RMgQWRWhWEFcdM"
upstream_id
(null)
total_cost
0.0037189
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Google AI Studio"
Evaluation details
Result
Evaluator
Details
Meta Data
0.12%
Matches word count
n/a
neededClean
false
sentences
10
wordCounts
0
17
1
15
2
16
3
16
4
15
5
15
6
15
7
14
8
14
9
15