NC Bench
Overview
About
Tests
Models
Vendors
Run: 2026-02-16-01KHK9M17MWQNQJAC3B5A9HYB0
Run Details
Model:
GPT-5.2
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
13.8s
Cost:
$0.011356
Provider:
OpenAI
Model input
User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 10 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
Rain stitched the harbor night, muffling footsteps on cobblestones below. Detective Mara Quinn watched lanterns tremble behind the customs shed. A whistle blew; the tide carried secrets toward black water. She followed a stray cat to the pier's locked gate. Someone had painted fresh numbers on splintered planks nearby tonight. Between crates, a body lay curled under tarpaulin, silent still. Mara lifted the edge, revealing frost on the man's lips. His pocket held a ticket stub, stamped for midnight passage. Footprints circled twice, then vanished where the rope ladder swung. From the fog, a violin note rose, sharp as accusation. She heard a cough above, and the lanterns suddenly died. In darkness, Mara whispered the victim's name, already knowing nothing.
created_at
"2026-02-16T13:18:30.24021+00:00"
2/16/2026, 1:18:30 PM
model
"openai/gpt-5.2-20251211"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
5144
moderation_latency
(null)
generation_time
13600
tokens_prompt
46
tokens_completion
590
native_tokens_prompt
41
native_tokens_completion
806
native_tokens_completion_images
0
native_tokens_reasoning
628
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
"completed"
usage
0.01135575
router
(null)
provider_responses
0
id
"resp_0231773a6146f59f016993191802f08197977bff1b16a932c2"
status
200
is_byok
false
latency
205
endpoint_id
"f00142c2-6a93-49ce-9e36-5593b904ce3b"
provider_name
"OpenAI"
model_permaslug
"openai/gpt-5.2-20251211"
api_type
"completions"
id
"gen-1771247895-q17ZZHtBvKGjZVqMY2ii"
upstream_id
"resp_0231773a6146f59f016993191802f08197977bff1b16a932c2"
total_cost
0.01135575
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
Evaluation details
Result
Evaluator
Details
Meta Data
100.0000%
Matches word count
n/a
neededClean
false
sentences
12
wordCounts
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10
8
10
9
10
10
10
11
10