Run: 2026-03-18-01KM08E6GV0BB5TYJD7CJG6C0A

Run Details

Duration:
14.6s
Cost:
$0.001728
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 Harbor Street as Detective Mara Ellery arrived at Graylock Manor for yet another impossible murder at dawn alone. Inside, the butler whispered that Lord Graylock vanished from his locked library, leaving only blood on lilies near the fireplace. Mara noted the window latch unbroken, yet a keyhole held fresh filings, suggesting someone escaped eagerly, tonight without leaving footprints. A maid trembled beside the hearth, insisting she heard violin music before the scream, then silence returned candles guttering low. On the floor, a single glove lay intact, stitched with initials that matched the victim's secretary named Celeste Ward, scribbled. Mara lifted it, smelling lavender and smoke, and vowed to question every guest before midnight locked again around this mansion.
created_at"2026-03-18T10:39:07.302Z" 3/18/2026, 10:39:07 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency14418
moderation_latency(null)
generation_time14473
tokens_prompt46
tokens_completion951
native_tokens_prompt41
native_tokens_completion1376
native_tokens_completion_images0
native_tokens_reasoning1213
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"
usage0.0017282
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_0e5ae36b708501320169ba80cb5bc48193a57ae4d4bd624349"
is_byokfalse
latency173
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-1773830347-VwN6eK2TzjwSkahfFhXs"
upstream_id"resp_0e5ae36b708501320169ba80cb5bc48193a57ae4d4bd624349"
total_cost0.0017282
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
020
120
220
320
420
520