Run: 2026-03-18-01KM07A3YKKJARRPKFRZN8F94E

Run Details

Duration:
1.5s
Cost:
$0.000908
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
77.52% Matches word count (details)

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
Rain stitched the manor windows closed, while lanterns trembled along the corridor, where tonight's guests smiled too carefully at one another. Detective Mara Vale arrived after midnight, carrying a damp coat, a keen stare, and the memory of three unsolved disappearances. In the library, Lord Ashcombe lay sprawled beside the hearth, his silver letter opener pinned beneath a single, deliberate wound. No one had touched the body, yet every guest possessed bloodshot eyes, trembling hands, and an alibi spoken far too quickly. Mara noticed the clock had stopped at eleven seventeen, exactly when the storm outside drowned every sound from the west wing. A maid whispered that the lord had summoned someone privately, and that afterward she heard glass breaking and a woman crying. As Mara studied the room, she found one wet footprint, one missing portrait, and one note reading, You are next.
created_at"2026-03-18T10:19:25.023Z" 3/18/2026, 10:19:25 AM
model"openai/gpt-5.4-mini-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency401
moderation_latency(null)
generation_time1394
tokens_prompt46
tokens_completion231
native_tokens_prompt41
native_tokens_completion195
native_tokens_completion_images0
native_tokens_reasoning0
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"
usage0.00090825
router(null)
provider_responses
0
endpoint_id"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id"resp_02e06068f433cb240169ba7c2d12e08190a1a27861f8e3f958"
is_byokfalse
latency168
model_permaslug"openai/gpt-5.4-mini-20260317"
provider_name"OpenAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.0; linux; x64))"
http_referer(null)
api_type"completions"
id"gen-1773829165-CUHtUtp9WwIspSVgZq8F"
upstream_id"resp_02e06068f433cb240169ba7c2d12e08190a1a27861f8e3f958"
total_cost0.00090825
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
77.52% Matches word count n/a
neededCleanfalse
sentences7
wordCounts
021
120
220
321
421
521
620