NC Bench
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Run: 2026-02-19-01KHVP8ZVXM0D3T17PH8Y0X2KV
Run Details
Model:
Gemini 3.1 Pro (Preview)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
42.0s
Cost:
$0.043720
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 hammered fiercely against the shattered Victorian library window. Detective Vance stared quietly at the bloody carpet below him. Arthur Pendelton was lying completely motionless near the roaring fireplace. A silver dagger protruded sharply from his upper left back. Blood pooled darkly across the expensive Persian rug beneath him. Lightning flashed suddenly beyond the dark trees in the distance. The grandfather clock ticked loudly within the deadly silent room. Someone had murdered the wealthy billionaire during his own party. Vance knelt slowly beside the fallen owner of the estate. He noticed a torn photograph clutched inside the frozen hand. A familiar female face smiled back at the grim detective. Footsteps echoed ominously down the long hallway behind the door. The killer was probably still hiding somewhere inside this mansion. Vance pulled his loaded weapon from his heavy leather holster. This thrilling game of cat and mouse had finally started.
created_at
"2026-02-19T19:33:20.732Z"
2/19/2026, 7:33:20 PM
model
"google/gemini-3.1-pro-preview-20260219"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3376
moderation_latency
(null)
generation_time
41855
tokens_prompt
46
tokens_completion
1297
native_tokens_prompt
38
native_tokens_completion
3637
native_tokens_completion_images
0
native_tokens_reasoning
3466
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
0.04372
router
(null)
provider_responses
0
endpoint_id
"2abf5677-0826-45d9-8470-3d62c31d54a1"
is_byok
false
latency
3376
model_permaslug
"google/gemini-3.1-pro-preview-20260219"
provider_name
"Google AI Studio"
status
200
api_type
"completions"
id
"gen-1771529600-z03acLCfy5MJ7OMciIj5"
upstream_id
(null)
total_cost
0.04372
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