Run: 2026-02-16-01KHKA0BDPM4P9SSF72AME77Q7

Run Details

Duration:
38.2s
Cost:
$0.006624
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 midnight bell chimed, and someone realized the study contained a body last night. Detective Marlowe arrived with tired eyes, coat soaked, carrying a notebook that smelled faintly of tobacco and rain and grief. Candles guttered in silver sconces while servants hovered in doorways, whispering alibis and offering trembling, useful denials they insisted loudly. Blood had dried in a pale crescent on oriental rug, a crabbed signature left by violence and haste and secrecy. A half-finished glass of claret rocked gently on the mantel, beside a smashed photograph and a smoking cigar, unnoticed still. Neighbors had already gathered outside iron gates, faces blurred with curiosity, dread, and the warm gossip of town after supper. Marlowe's hands trembled only once, when he lifted the victim's wrist and found the faint, impossibly small bruise, an accusation. He looked up at those gathered, measuring their faces for lies, noting too how the house seemed older and colder.
created_at"2026-02-16T13:25:38.139111+00:00" 2/16/2026, 1:25:38 PM
model"openai/gpt-5-mini-2025-08-07"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2572
moderation_latency(null)
generation_time38095
tokens_prompt46
tokens_completion995
native_tokens_prompt41
native_tokens_completion3307
native_tokens_completion_images0
native_tokens_reasoning3072
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"
usage0.00662425
router(null)
provider_responses
0
id"resp_010c9912d50006c30169931aab8bf081969e55d04a8e25988f"
status200
is_byokfalse
latency125
endpoint_id"c4f66d01-20b0-4c27-a225-438ea22fda43"
provider_name"OpenAI"
model_permaslug"openai/gpt-5-mini-2025-08-07"
api_type"completions"
id"gen-1771248299-lLuMGFUK885syZq7XrwN"
upstream_id"resp_010c9912d50006c30169931aab8bf081969e55d04a8e25988f"
total_cost0.00662425
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
95.0816% Matches word count n/a
neededCleanfalse
sentences8
wordCounts
020
120
220
320
421
520
620
720