Run: 2026-03-09-01KKACBP7HNZA0SSQCYCRKRP2G

Run Details

Duration:
16.5s
Cost:
$0.015973
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
100.00% 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 worried the manor windows while guests assembled beneath the chandelier, pretending warmth, though every polished surface reflected suspicion already. At precisely eight, Lady Wren dismissed the musicians, and silence entered first, gloved and smiling, before the body appeared upstairs. No one admitted hearing the scream, yet everyone remembered the clock's bronze raven striking once, then choking mid-note above them. When the butler opened the library door, candlelight revealed Sir Alistair collapsed beside the atlas, one hand blackened with poison. His other hand clutched a torn photograph showing all seven guests, although someone had carefully scratched out one face entirely. Inspector Vale arrived through thunder and mud, surveyed the room once, and remarked that murder had excellent timing tonight indeed. Then he noticed the extinguished fireplace, untouched brandy, and a fresh rose petal hidden inside Alistair's left shoe that night. By the time lightning whitened the hall again, every guest had acquired an alibi, and none had improved one bit.
created_at"2026-03-09T22:44:21.885Z" 3/9/2026, 10:44:21 PM
model"openai/gpt-5.4-20260305"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency14772
moderation_latency(null)
generation_time16098
tokens_prompt46
tokens_completion274
native_tokens_prompt41
native_tokens_completion1058
native_tokens_completion_images0
native_tokens_reasoning848
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"
usage0.0159725
router(null)
provider_responses
0
endpoint_id"9ff5625c-403f-4d7f-b895-58ac7295062c"
id"resp_00ad1cb562e5c92d0169af4d462a808197a98a74f95e16e750"
is_byokfalse
latency337
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-1773096261-75NQyF5awAp5zZ8rR4Ia"
upstream_id"resp_00ad1cb562e5c92d0169af4d462a808197a98a74f95e16e750"
total_cost0.0159725
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences8
wordCounts
020
120
220
320
420
520
620
720