NC Bench
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Run: 2026-02-19-01KHVPR5G65PDHH53RCF43KCDM
Run Details
Model:
Gemini 3.1 Pro (Preview)
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
36.5s
Cost:
$0.049862
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 5 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
Rain slammed against the window. Detective Vance entered the room. Heavy shadows hid the corners. Blood soaked the Persian rug. Lady Beatrice lay perfectly still. Her lifeless eyes stared upward. The murder weapon was missing. Thunder echoed through the mansion. Someone had hated her deeply. Footsteps sounded in the hallway. The killer remained very close. Vance drew his service weapon. He turned toward the door. The heavy brass handle turned. A familiar face peeked inside. The butler looked incredibly pale. He wore torn bloody gloves. The butler trembled with fear. He possessed a dark secret. Vance stepped toward the man. Tonight would answer every question.
created_at
"2026-02-19T19:41:38.013Z"
2/19/2026, 7:41:38 PM
model
"google/gemini-3.1-pro-preview-20260219"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3103
moderation_latency
(null)
generation_time
36353
tokens_prompt
46
tokens_completion
1311
native_tokens_prompt
37
native_tokens_completion
4149
native_tokens_completion_images
0
native_tokens_reasoning
4021
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
0.049862
router
(null)
provider_responses
0
endpoint_id
"2abf5677-0826-45d9-8470-3d62c31d54a1"
is_byok
false
latency
3103
model_permaslug
"google/gemini-3.1-pro-preview-20260219"
provider_name
"Google AI Studio"
status
200
api_type
"completions"
id
"gen-1771530098-PUaSJtiMPn8K3b3DsGX5"
upstream_id
(null)
total_cost
0.049862
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
21
wordCounts
0
5
1
5
2
5
3
5
4
5
5
5
6
5
7
5
8
5
9
5
10
5
11
5
12
5
13
5
14
5
15
5
16
5
17
5
18
5
19
5
20
5