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Run: 2026-02-16-01KHK9RVS8Z7SPYBS8MCCSYDZ8
Run Details
Model:
GPT-5.2
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
23.3s
Cost:
$0.020092
Provider:
OpenAI
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
Rain stitched the harbor fog as Inspector Mara Voss arrived, summoned to the Halloway Hotel before sunrise, alone at once. Inside, the lobby clock ticked too loudly, and the clerk avoided her eyes, offering a brass room key without comment. On the third floor, a corridor smelled of lilies and coal smoke, though no fireplace burned there tonight at all. Room seventeen stood ajar, its lamp still lit, casting honeyed light across scattered letters and broken glass shards on carpet. The victim, Judge Halloway, lay facedown by the window, hands ink stained, throat bruised, pockets empty despite his locked door. Mara noted no blood, no weapon, only a damp footprint beside the radiator, pointing toward the stairwell and then vanishing. A violin played somewhere below, a slow waltz repeating, while guests slept, or pretended, behind polished doors through the night. She picked up the letters, realizing each bore her name, and one carried fresh ash from yesterday's train to Blackport. When the clerk returned, he whispered that everyone had alibis, yet the judge checked in under hers using her signature. Mara closed the door gently, listening to the waltz stop, and understood the murderer watched her already from the shadows.
created_at
"2026-02-16T13:21:18.289884+00:00"
2/16/2026, 1:21:18 PM
model
"openai/gpt-5.2-20251211"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
4811
moderation_latency
(null)
generation_time
23126
tokens_prompt
46
tokens_completion
972
native_tokens_prompt
41
native_tokens_completion
1430
native_tokens_completion_images
0
native_tokens_reasoning
1155
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
0.02009175
router
(null)
provider_responses
0
id
"resp_0ce1d1f5b067c74201699319b62468819399ac941e57da436c"
status
200
is_byok
false
latency
149
endpoint_id
"f00142c2-6a93-49ce-9e36-5593b904ce3b"
provider_name
"OpenAI"
model_permaslug
"openai/gpt-5.2-20251211"
api_type
"completions"
id
"gen-1771248054-bHBxuwt0DZ696yf9zJPI"
upstream_id
"resp_0ce1d1f5b067c74201699319b62468819399ac941e57da436c"
total_cost
0.02009175
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
10
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20
7
20
8
20
9
20