NC Bench
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Run: 2026-02-19-01KHVP95X7CD3NP022WYC6HNS2
Run Details
Model:
Gemini 3.1 Pro (Preview)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
1m 13s
Cost:
$0.069484
Provider:
Google AI Studio
Evaluation summary
Score
Evaluator
Details Link
100.00%
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
Wind howled outside the shattered window of the dark study. Rain washed away the bloody footprints on the wooden floor. Detective Hayes stared at the lifeless body on the carpet. Crimson liquid dripped slowly from the edge of the desk. Arthur Pendelton was wealthy enough to afford many powerful enemies. Now he lay dead beside a heavy silver letter opener. The grandfather clock chimed midnight in the completely silent hallway. Hayes knelt down to examine the victim with careful precision. A torn photograph rested quietly beneath those exceptionally cold fingers. Someone desperately wanted to hide the identity of the killer. Thunder rattled the fragile glass of the antique crystal chandelier. Shadows moved along the floral wallpaper of the grand library. The murderer was likely still hiding within this massive house. Hayes pulled his loaded revolver from his damp winter coat. He stepped slowly toward the slightly open solid oak door. Floorboards creaked under his heavy boots in the terrible silence. An unfamiliar voice echoed from the bottom of the stairs. The game of cat and mouse had only just begun.
created_at
"2026-02-19T19:33:26.918Z"
2/19/2026, 7:33:26 PM
model
"google/gemini-3.1-pro-preview-20260219"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
4814
moderation_latency
(null)
generation_time
73213
tokens_prompt
46
tokens_completion
1840
native_tokens_prompt
38
native_tokens_completion
5784
native_tokens_completion_images
0
native_tokens_reasoning
5580
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
0.069484
router
(null)
provider_responses
0
endpoint_id
"2abf5677-0826-45d9-8470-3d62c31d54a1"
is_byok
false
latency
4814
model_permaslug
"google/gemini-3.1-pro-preview-20260219"
provider_name
"Google AI Studio"
status
200
api_type
"completions"
id
"gen-1771529606-C3OXNrdZ3PfnvoxkmEyn"
upstream_id
(null)
total_cost
0.069484
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Google AI Studio"
Evaluation details
Result
Evaluator
Details
Meta Data
100.00%
Matches word count
n/a
neededClean
false
sentences
18
wordCounts
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10
8
10
9
10
10
10
11
10
12
10
13
10
14
10
15
10
16
10
17
10