Run: 2026-03-18-01KM08ZT7JSYJ3EAN2WAEWF4W2

Run Details

Duration:
14.0s
Cost:
$0.001368
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 streaked the courthouse steps as Detective Mara Quinn arrived, coat dripping, searching for the missing gavel before sunrise today. Inside, the clerk whispered that Judge Ellery had died quietly, yet the room smelled of lilacs and smoke too strangely. Uniforms sealed the jury box, and Mara noted fresh mud prints leading from the coat stand to glass doors outside. On the floor lay a broken watch, stopped at 3:17, beside a torn ribbon from her own file folder case. When she knelt, the judge's spectacles gleamed, and a single drop of ink marked his cuff precisely at midnight exactly. The coroner reported no struggle, but the ceiling fan turned slowly, despite sealed vents above where no draft should exist. Mara asked for the bailiff, and he answered with trembling hands, pointing toward the locked storeroom door right behind her. The latch clicked open, revealing a violin case, still warm, and a note written in lilac ink for her alone.
created_at"2026-03-18T10:48:44.542Z" 3/18/2026, 10:48:44 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency13431
moderation_latency(null)
generation_time13763
tokens_prompt46
tokens_completion846
native_tokens_prompt41
native_tokens_completion1088
native_tokens_completion_images0
native_tokens_reasoning874
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"
usage0.0013682
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_06ed91bb5dfdcf960169ba830ca89081949e254ab89225aed4"
is_byokfalse
latency273
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-1773830924-Z6l5NTJHxCa0I9pGpQ41"
upstream_id"resp_06ed91bb5dfdcf960169ba830ca89081949e254ab89225aed4"
total_cost0.0013682
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