NC Bench
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Run: 2026-02-19-01KHVPG35D01Y84RXR89M19MCE
Run Details
Model:
Gemini 3.1 Pro (Preview)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
1m 2s
Cost:
$0.081928
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
Detective Vance pushed the heavy oak door open without hesitation. Rain splashed against the cracked windows of the dark mansion. He stepped inside the silent hallway and grabbed his flashlight. A horrible metallic smell lingered undisturbed in the damp air. Someone had completely destroyed the grand chandelier above the stairs. Pieces of expensive glass lay scattered across the polished floor. An elderly gentleman bled profusely upon the torn Persian rug. The victim stared blindly toward the carefully painted ceiling vault. Vance noticed a silver dagger protruding from his velvet coat. Footsteps suddenly echoed from the shadows upstairs near the bedroom. The mysterious killer remained trapped inside this thoroughly isolated house. Vance pulled out his loaded revolver and slowly walked forward. Another loud noise crashed somewhere beyond the second floor landing. The very first clue waited patiently in the looming darkness. This complicated murder case was finally ready to be solved.
created_at
"2026-02-19T19:37:13.481Z"
2/19/2026, 7:37:13 PM
model
"google/gemini-3.1-pro-preview-20260219"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3505
moderation_latency
(null)
generation_time
61591
tokens_prompt
46
tokens_completion
2283
native_tokens_prompt
38
native_tokens_completion
6821
native_tokens_completion_images
0
native_tokens_reasoning
6655
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
0.081928
router
(null)
provider_responses
0
endpoint_id
"2abf5677-0826-45d9-8470-3d62c31d54a1"
is_byok
false
latency
3503
model_permaslug
"google/gemini-3.1-pro-preview-20260219"
provider_name
"Google AI Studio"
status
200
api_type
"completions"
id
"gen-1771529833-cWVJmDzN9AKBz3rI6fJU"
upstream_id
(null)
total_cost
0.081928
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
15
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