Run: 2026-03-18-01KM07T1P8EAY55MNEGKEDM2VX

Run Details

Duration:
1.4s
Cost:
$0.000742
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
59.36% 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 needled the windows of Blackmere Manor, and Inspector Vale arrived to find the guesthouse candle still burning downstairs. Inside, the servants whispered, the clocks had stopped at eleven, and Lady Ashford’s body lay beneath the grand staircase. A silver letter opener rested near her hand, yet the blood on its hilt looked too fresh for a suicide. Vale noticed three muddy footprints crossing the marble, each smaller than the last, leading toward the library’s locked door. When the housekeeper swore nobody had entered that room, a faint tapping sounded from within, like fingernails on wood. Vale turned the handle slowly, and the room answered with silence, a shattered vase, and one missing portrait.
created_at"2026-03-18T10:28:07Z" 3/18/2026, 10:28:07 AM
model"openai/gpt-5.4-mini-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency451
moderation_latency(null)
generation_time1238
tokens_prompt46
tokens_completion186
native_tokens_prompt41
native_tokens_completion158
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"
usage0.00074175
router(null)
provider_responses
0
endpoint_id"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id"resp_0841beb341de7e7a0169ba7e3715bc8197a9868de06b58a8b4"
is_byokfalse
latency235
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-1773829687-ETM6812X34VJvYhbACUt"
upstream_id"resp_0841beb341de7e7a0169ba7e3715bc8197a9868de06b58a8b4"
total_cost0.00074175
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
59.36% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
019
119
220
319
419
518