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Run: 2026-02-25-01KJ95B3FAXEBDWRK7YXEYAV42
Run Details
Model:
Gemini 2.5 Flash (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
6.8s
Cost:
$0.003759
Provider:
Google AI Studio
Evaluation summary
Score
Evaluator
Details Link
0.22%
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
The grand ballroom lay eerily silent under the chandeliers' dim, dusty, forgotten, and ancient, peculiar glow. Detective Miles Corbin absolutely hated these incredibly rude, early morning calls disrupting his precious, peaceful slumber. A chill wind whipped around the ornate, sprawling mansion, rustling countless dead leaves across the stony path. Rain had just recently ceased, leaving glistening puddles to reflect the oppressive, grey, and unforgiving dawn sky. A uniformed officer, Sergeant Miller, stood waiting patiently by the massive, intricately carved oak front door. "Good morning, Detective," Miller offered, his voice a low, tired rumble, laced with palpable fatigue. Corbin merely nodded slowly, suppressing a yawn, already dreading the grim, unpleasant, tiresome tasks ahead. "It's upstairs," Miller continued, gesturing towards the grand, curving staircase looming in the massive, darkened foyer. Each heavy bootstep echoed ominously on the polished marble as they silently, slowly ascended the opulent steps. The lingering stench of stale perfume and something else, something metallic, grew stronger steadily now. They stopped before a bedroom door, slightly ajar, revealing faint, flickering yellow light from inside. Corbin pushed the ornate door fully open, his gaze sweeping across the opulent, silent room. An elderly woman lay sprawled grotesquely upon the plush, crimson carpet beside her expensive, antique bed. Her vacant eyes stared upward, reflecting nothing but the elegant ceiling's faded, ornate patterns. A silver letter opener, caked with drying crimson, protruded from her expensive, silk nightgown. Miles Corbin felt the familiar, cold knot tighten instantly in his weary, tired stomach.
created_at
"2026-02-25T01:06:46.385Z"
2/25/2026, 1:06:46 AM
model
"google/gemini-2.5-flash"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1135
moderation_latency
(null)
generation_time
6747
tokens_prompt
46
tokens_completion
1070
native_tokens_prompt
38
native_tokens_completion
1499
native_tokens_completion_images
0
native_tokens_reasoning
1172
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
0.0037589
router
(null)
provider_responses
0
endpoint_id
"16c01e26-9b91-4d22-b487-ed35634b017d"
is_byok
false
latency
1135
model_permaslug
"google/gemini-2.5-flash"
provider_name
"Google AI Studio"
status
200
api_type
"completions"
id
"gen-1771981606-By3jsp77zXwU9l8UGwWr"
upstream_id
(null)
total_cost
0.0037589
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Google AI Studio"
Evaluation details
Result
Evaluator
Details
Meta Data
0.22%
Matches word count
n/a
neededClean
false
sentences
16
wordCounts
0
16
1
16
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17
3
17
4
16
5
15
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15
7
16
8
17
9
15
10
15
11
15
12
16
13
14
14
14
15
14