NC Bench
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Run: 2026-02-19-01KHVPQ64FPGRH47087QKSJGFF
Run Details
Model:
Gemini 3.1 Pro (Preview)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
38.2s
Cost:
$0.051832
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
The cold rain fell heavily on the dark window while the dead body was lying on the expensive Persian carpet. Detective Arthur Miller stood in the doorway, observing the bloody scene with a very grim expression on his tired face. The wealthy victim wore a completely ruined suit, and a beautiful silver dagger protruded sharply from his upper left back. A shattered glass lay near the pale hand, spilling red wine across the polished wooden floor towards the heavy desk. Thunder echoed loudly through the dreadful mansion, masking the sound of quiet footsteps coming from the grand marble staircase outside. Miller slowly pulled a pair of clean latex gloves from his tan coat pocket, stepping carefully over the red wine. Only three people held a valid brass key to this isolated room, and all three possessed terrible reasons for murder. The experienced detective knew this difficult investigation would finally reveal the darkest secrets hiding within this deeply fractured aristocratic family.
created_at
"2026-02-19T19:41:05.891Z"
2/19/2026, 7:41:05 PM
model
"google/gemini-3.1-pro-preview-20260219"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3158
moderation_latency
(null)
generation_time
38047
tokens_prompt
46
tokens_completion
1557
native_tokens_prompt
38
native_tokens_completion
4313
native_tokens_completion_images
0
native_tokens_reasoning
4138
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
0.051832
router
(null)
provider_responses
0
endpoint_id
"2abf5677-0826-45d9-8470-3d62c31d54a1"
is_byok
false
latency
3158
model_permaslug
"google/gemini-3.1-pro-preview-20260219"
provider_name
"Google AI Studio"
status
200
api_type
"completions"
id
"gen-1771530065-hbEiM1ShWlSGeM7ydeCP"
upstream_id
(null)
total_cost
0.051832
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
8
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20
7
20