NC Bench
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Run: 2026-02-19-01KHVP09Y56YV25D1G3VY2Q15F
Run Details
Model:
Gemini 3.1 Pro (Preview)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
40.7s
Cost:
$0.037156
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 shattered glass of the window. Detective Vance stepped slowly into the dark and silent room. A pale hand extended from beneath the heavy velvet curtain. Blood stained the expensive white carpet with a crimson circle. He knelt beside the lifeless body of the wealthy banker. A silver dagger rested firmly between the cold shoulder blades. Arthur Pendelton had many enemies within this quiet coastal town. Vance noticed a torn photograph clutched inside the frozen fingers. Suddenly, a floorboard creaked somewhere in the hallway behind him. The killer was clearly still waiting inside the shadowed house. He slowly drew his loaded pistol from his leather holster. Lightning flashed brightly across the stormy midnight sky above them. Footsteps echoed loudly as a dark figure dashed away quickly. The greatest mystery of his long career had just begun.
created_at
"2026-02-19T19:28:36.423Z"
2/19/2026, 7:28:36 PM
model
"google/gemini-3.1-pro-preview-20260219"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
4108
moderation_latency
(null)
generation_time
40086
tokens_prompt
46
tokens_completion
997
native_tokens_prompt
38
native_tokens_completion
3090
native_tokens_completion_images
0
native_tokens_reasoning
2929
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
0.037156
router
(null)
provider_responses
0
endpoint_id
"2abf5677-0826-45d9-8470-3d62c31d54a1"
is_byok
false
latency
4108
model_permaslug
"google/gemini-3.1-pro-preview-20260219"
provider_name
"Google AI Studio"
status
200
api_type
"completions"
id
"gen-1771529316-6D4tn1K0BSWYtoD8QPnw"
upstream_id
(null)
total_cost
0.037156
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
14
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