Run: 2026-03-18-01KM0A13QXWV5V34WJT6DFTVBN

Run Details

Duration:
4.8s
Cost:
$0.001074
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 slicked the manor steps as Inspector Hale arrived, breathing cold air, and noticed a locked study door tonight again. Inside, Dr. Morland lay across the library rug, eyes open, a silver letter opener planted beside his hand quietly there. Servants whispered that the doctor argued earlier with Sir Malcolm over debts and a missing sapphire heirloom from the vault. Hale lifted the opener, finding no blood on its edge, yet powdery ash coated the blade almost everywhere today too. The grandfather clock stopped at 9:17, while windows stayed bolted, leaving no sound except thunder for hours afterward outside alone. Sir Malcolm stood pale, claiming innocence, and demanded Hale examine his alibi over brandy and candles right away in silence. When Hale questioned the butler, he noticed a trail of soot leading from hearth to study near midnight carefully wiped.
created_at"2026-03-18T11:06:55.623Z" 3/18/2026, 11:06:55 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4504
moderation_latency(null)
generation_time4701
tokens_prompt46
tokens_completion225
native_tokens_prompt41
native_tokens_completion853
native_tokens_completion_images0
native_tokens_reasoning668
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"
usage0.00107445
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_007b74f62e33d8c10169ba874fae448196ac75f05ad64fb8bb"
is_byokfalse
latency269
model_permaslug"openai/gpt-5.4-nano-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-1773832015-ZqRsI0KUSqGBFwWfeyJf"
upstream_id"resp_007b74f62e33d8c10169ba874fae448196ac75f05ad64fb8bb"
total_cost0.00107445
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences7
wordCounts
020
120
220
320
420
520
620