NC Bench
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Run: 2026-02-19-01KHVPAT62C4V0T5EQG8JR7MFC
Run Details
Model:
Gemini 3.1 Pro (Preview)
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
38.1s
Cost:
$0.039038
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
Thick fog choked the city. Rain lashed the dirty window. Detective Vance entered the room. Heavy silence greeted his arrival. A body lay perfectly still. Blood pooled on luxury carpet. The victim was brutally stabbed. Vance knelt by the corpse. Cold skin felt like marble. Her empty eyes stared upward. A shattered glass lay nearby. Lipstick stained the broken rim. Someone left in a hurry. Muddy footprints ruined the floor. They led toward the hallway. Sudden footsteps echoed right outside. Vance drew his service weapon. The killer was still close. Shadows danced along brick walls. He heard a floorboard creak. The heavy door swung open. A masked figure stood there. The real mystery just began.
created_at
"2026-02-19T19:34:20.448Z"
2/19/2026, 7:34:20 PM
model
"google/gemini-3.1-pro-preview-20260219"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3240
moderation_latency
(null)
generation_time
37915
tokens_prompt
46
tokens_completion
1312
native_tokens_prompt
37
native_tokens_completion
3247
native_tokens_completion_images
0
native_tokens_reasoning
3078
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
0.039038
router
(null)
provider_responses
0
endpoint_id
"2abf5677-0826-45d9-8470-3d62c31d54a1"
is_byok
false
latency
3240
model_permaslug
"google/gemini-3.1-pro-preview-20260219"
provider_name
"Google AI Studio"
status
200
api_type
"completions"
id
"gen-1771529660-bPERIURV7iTI0ldiU1DY"
upstream_id
(null)
total_cost
0.039038
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
23
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