Run: 2026-02-16-01KHK9JNDD8RYKVNBGZ5ZCYZ4D

Run Details

Duration:
16.7s
Cost:
$0.013764
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

AI
Fog pressed against the manor windows as Inspector Hale arrived, summoned by a midnight call from Lady Varrin alone tonight. In the foyer, candles guttered, and guests whispered of theft, while a gramophone played waltzes too cheerfully softly for mourning. Lady Varrin led him upstairs, past portraits watching, to the library where Sir Alistair lay facedown beside ink spilled everywhere. The window stood open, yet the latch was unbroken, and snow on the sill held no footprints at all tonight. On the desk, a sealed envelope bore Hale's name, its wax stamped with a serpent curling around roses in red. Before he touched it, the butler confessed hearing a quarrel, but claimed the voices ended suddenly upstairs near the clock. Hale studied the corpse's hand, noticing missing cufflinks, and realized everyone present wore gloves despite the fire burning bright below.
created_at"2026-02-16T13:17:47.849703+00:00" 2/16/2026, 1:17:47 PM
model"openai/gpt-5.2-20251211"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency14484
moderation_latency(null)
generation_time16187
tokens_prompt46
tokens_completion226
native_tokens_prompt41
native_tokens_completion978
native_tokens_completion_images0
native_tokens_reasoning786
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"completed"
usage0.01376375
router(null)
provider_responses
0
id"resp_0e74821f9d1d538501699318eb024c8196aa382895019fd959"
status200
is_byokfalse
latency23
endpoint_id"f00142c2-6a93-49ce-9e36-5593b904ce3b"
provider_name"OpenAI"
model_permaslug"openai/gpt-5.2-20251211"
api_type"completions"
id"gen-1771247850-IFfiK2SxvlGTUaQJKKPw"
upstream_id"resp_0e74821f9d1d538501699318eb024c8196aa382895019fd959"
total_cost0.01376375
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.0000% Matches word count n/a
neededCleanfalse
sentences7
wordCounts
020
120
220
320
420
520
620