Run: 2026-03-06-01KK1HMY7EM64XFP86EEKZ0061

Run Details

Duration:
4.1s
Cost:
$0.002008
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
49.67% 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
At midnight, Blackthorn Manor held its breath while rain clawed the windows and every portrait watched the grand staircase silently. Lady Haversham descended in white silk, clutching a silver candlestick, her footsteps hushed by carpets older than anyone living. In the library, a clock struck twelve, and somewhere below, a door slammed hard enough to rattle decanters. When the scream came, it seemed torn from the house itself, sharp and sudden, then swallowed by thunder. They found Sir Alistair beside the hearth, eyes open, throat dark with blood, one hand gripping a missing button.
created_at"2026-03-06T12:23:37.973Z" 3/6/2026, 12:23:37 PM
model"openai/gpt-5.4-20260305"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency362
moderation_latency(null)
generation_time4022
tokens_prompt46
tokens_completion151
native_tokens_prompt41
native_tokens_completion127
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"
usage0.0020075
router(null)
provider_responses
0
endpoint_id"9ff5625c-403f-4d7f-b895-58ac7295062c"
id"resp_06b71c14aedbd1c70169aac74a07fc8197926e9399d110d0c4"
is_byokfalse
latency142
model_permaslug"openai/gpt-5.4-20260305"
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-1772799817-ncb6UAJ4UGjEGE4FyUiv"
upstream_id"resp_06b71c14aedbd1c70169aac74a07fc8197926e9399d110d0c4"
total_cost0.0020075
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
49.67% Matches word count n/a
neededCleanfalse
sentences5
wordCounts
020
119
218
318
419