NC Bench
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Run: 2026-02-19-01KHVPER0E5MHN9KC3SCTRSC4B
Run Details
Model:
Gemini 3.1 Pro (Preview)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
37.0s
Cost:
$0.048604
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 20 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
Thunder shook the ancient manor house while heavy rain battered against the tall stained glass windows facing the dark garden. Detective Miller pushed open the heavy oak doors and immediately noticed the lifeless body resting quietly on the expensive rug. Crimson blood pooled around the wealthy victim as a single silver candlestick lay abandoned near his perfectly manicured right hand. Shadows danced across the cold stone walls every time bright lightning flashed through the terrible storm outside the silent room. Miller knelt carefully beside the strange corpse and saw a small crumpled note stuffed hastily inside the torn jacket pocket. Unfolding the white paper with gloved fingers revealed three typed words warning everyone about another brutal killing happening by midnight. The grandfather clock suddenly struck eleven times loudly down the long hallway, leaving exactly one hour to catch the killer.
created_at
"2026-02-19T19:36:29.292Z"
2/19/2026, 7:36:29 PM
model
"google/gemini-3.1-pro-preview-20260219"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3529
moderation_latency
(null)
generation_time
36361
tokens_prompt
46
tokens_completion
1293
native_tokens_prompt
38
native_tokens_completion
4044
native_tokens_completion_images
0
native_tokens_reasoning
3891
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
0.048604
router
(null)
provider_responses
0
endpoint_id
"2abf5677-0826-45d9-8470-3d62c31d54a1"
is_byok
false
latency
3529
model_permaslug
"google/gemini-3.1-pro-preview-20260219"
provider_name
"Google AI Studio"
status
200
api_type
"completions"
id
"gen-1771529789-6riFekDVc7F6KSAXTEGu"
upstream_id
(null)
total_cost
0.048604
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
7
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20