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Run: 2026-02-25-01KJ94JWWKRTK72E2A56BM9JPS
Run Details
Model:
Gemini 2.5 Flash (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
6.8s
Cost:
$0.003964
Provider:
Google AI Studio
Evaluation summary
Score
Evaluator
Details Link
89.33%
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 precinct window, drumming loudly. Detective Miles Harding usually worked through these late night hours. Tonight's urgent call felt different, strangely cold, truly unsettling. His old car sputtered, struggling down the flooded city street. The address finally appeared, an imposing old Victorian townhouse. Yellow crime tape already surrounded the perimeter, flapping loudly. Uniformed officers huddled near the porch, looking quite grim-faced. Sergeant Miller met him quickly, rain dripping from his hat. "Another one, boss," Miller said, voice heavy with concern. Miles nodded slowly, pushing open the imposing heavy front door. The foyer was grand, but smelled distinctly of something metallic. A single spotlight illuminated the victim, lying very, very still. Lady Eleanor Vance lay sprawled upon the priceless marble floor. Her silken nightgown stained a deep, horrifying crimson color now. A silver letter opener rested beside her, glinting most wickedly. Miles felt the familiar icy dread grip his weary heart. Another ghost joined the countless others in this dark, cold city.
created_at
"2026-02-25T00:53:33.208Z"
2/25/2026, 12:53:33 AM
model
"google/gemini-2.5-flash"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1399
moderation_latency
(null)
generation_time
6729
tokens_prompt
46
tokens_completion
820
native_tokens_prompt
38
native_tokens_completion
1581
native_tokens_completion_images
0
native_tokens_reasoning
1374
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
0.0039639
router
(null)
provider_responses
0
endpoint_id
"16c01e26-9b91-4d22-b487-ed35634b017d"
is_byok
false
latency
1398
model_permaslug
"google/gemini-2.5-flash"
provider_name
"Google AI Studio"
status
200
api_type
"completions"
id
"gen-1771980813-LcK2U9F5TpPEB8tOnAm1"
upstream_id
(null)
total_cost
0.0039639
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Google AI Studio"
Evaluation details
Result
Evaluator
Details
Meta Data
89.33%
Matches word count
n/a
neededClean
false
sentences
17
wordCounts
0
9
1
10
2
9
3
10
4
9
5
9
6
9
7
10
8
9
9
10
10
10
11
10
12
10
13
10
14
10
15
10
16
11