NC Bench
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Run: 2026-02-19-01KHVPKEB4P2JBGBXG8NG4Z9H7
Run Details
Model:
Gemini 3.1 Pro (Preview)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
37.3s
Cost:
$0.037576
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
Heavy rain pounded against the cracked glass of the window. Blood pooled slowly beneath the lifeless man on the carpet. Detective Vance knelt down to inspect the gruesome crime scene. A silver dagger rested inches away from his cold fingers. Someone had locked the heavy oak door from the inside. No clear escape route existed within this perfectly square room. The dead millionaire wore a sharply tailored black tuxedo tonight. Vance discovered a torn photograph hidden inside the breast pocket. Half of a smiling woman remained visible in the picture. The killer deliberately left this specific message for the police. Lightning flashed outside while thunder shook the entire lonely mansion. Someone extremely dangerous still lurked somewhere within these dark walls. He pulled his revolver and prepared for a tense search.
created_at
"2026-02-19T19:39:03.231Z"
2/19/2026, 7:39:03 PM
model
"google/gemini-3.1-pro-preview-20260219"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3378
moderation_latency
(null)
generation_time
36945
tokens_prompt
46
tokens_completion
1144
native_tokens_prompt
38
native_tokens_completion
3125
native_tokens_completion_images
0
native_tokens_reasoning
2981
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
0.037576
router
(null)
provider_responses
0
endpoint_id
"2abf5677-0826-45d9-8470-3d62c31d54a1"
is_byok
false
latency
3378
model_permaslug
"google/gemini-3.1-pro-preview-20260219"
provider_name
"Google AI Studio"
status
200
api_type
"completions"
id
"gen-1771529943-1Urunu4NAbj5b818X7gr"
upstream_id
(null)
total_cost
0.037576
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
13
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