NC Bench
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Run: 2026-02-19-01KHVPFBG5Q3THVGPE8V5NQ4C7
Run Details
Model:
Gemini 3.1 Pro (Preview)
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
35.1s
Cost:
$0.047810
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
Heavy rain battered the window. Thunder shook the dark mansion. Detective Vance entered the study. Blood stained the Persian rug. Lord Blackwood lay completely still. A silver knife pierced him. His dead eyes stared upward. Glass covered the oak floor. Someone shattered the patio door. Vance lit his brass pipe. Smoke drifted into cold air. The killer left no footprints. Only one clue remained behind. One red rose rested nearby. This murder was deeply personal. Vance checked his gold watch. Midnight brought a grim puzzle. Three suspects waited down below. Every suspect hated the victim. Now the real game begins.
created_at
"2026-02-19T19:36:49.247Z"
2/19/2026, 7:36:49 PM
model
"google/gemini-3.1-pro-preview-20260219"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2974
moderation_latency
(null)
generation_time
34899
tokens_prompt
46
tokens_completion
1203
native_tokens_prompt
37
native_tokens_completion
3978
native_tokens_completion_images
0
native_tokens_reasoning
3850
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
0.04781
router
(null)
provider_responses
0
endpoint_id
"2abf5677-0826-45d9-8470-3d62c31d54a1"
is_byok
false
latency
2974
model_permaslug
"google/gemini-3.1-pro-preview-20260219"
provider_name
"Google AI Studio"
status
200
api_type
"completions"
id
"gen-1771529809-V44tsthb8fOqAdQ2Pvt6"
upstream_id
(null)
total_cost
0.04781
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
20
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