NC Bench
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Run: 2026-02-19-01KHVPDHYGQA7WR3K7Y8NKHF7X
Run Details
Model:
Gemini 3.1 Pro (Preview)
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
30.2s
Cost:
$0.040442
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
The rain pounded the glass. Detective Vance entered the room. Shadows danced on the walls. A cold wind chilled him. Blood stained the Persian rug. Lord Blackwood lay perfectly still. A silver dagger pierced deep. His lifeless eyes stared upward. No breath escaped his lips. The killer left no trace. Vance knelt near the corpse. He inspected the brutal wound. This was no random attack. Someone wanted the lord dead. Thunder echoed through the mansion. The long night just began. Every suspect slept right upstairs. Lies would surface very soon. Vance pulled out his notebook. He wrote the first clue. The tall clock struck midnight. Time to find a murderer. A floorboard creaked behind him. Someone else was awake now. Vance slowly drew his gun. The deadly game started tonight.
created_at
"2026-02-19T19:35:50.317Z"
2/19/2026, 7:35:50 PM
model
"google/gemini-3.1-pro-preview-20260219"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3417
moderation_latency
(null)
generation_time
30089
tokens_prompt
46
tokens_completion
948
native_tokens_prompt
37
native_tokens_completion
3364
native_tokens_completion_images
0
native_tokens_reasoning
3205
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
0.040442
router
(null)
provider_responses
0
endpoint_id
"2abf5677-0826-45d9-8470-3d62c31d54a1"
is_byok
false
latency
3417
model_permaslug
"google/gemini-3.1-pro-preview-20260219"
provider_name
"Google AI Studio"
status
200
api_type
"completions"
id
"gen-1771529750-YLuAOko1ET0JHvG6QsAM"
upstream_id
(null)
total_cost
0.040442
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
26
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
21
5
22
5
23
5
24
5
25
5