Run: 2026-04-24-01KQ0PHV1W16WWX0MY4XH33B3N

Run Details

Duration:
14.3s
Cost:
$0.029215
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 stitched the manor's windows as Inspector Vale arrived, finding every clock stopped at midnight and the butler silently bleeding. Lady Harrow stood beside the staircase, white gloves spotless, while her guests whispered accusations into cups of cooling tea nearby. On the parquet floor lay a silver cufflink, engraved with initials belonging to no one invited that evening at all. Vale noticed the library door ajar, and beyond it, Lord Harrow's portrait hanging crooked above fresh ashes on marble tiles. The dead man's hand clutched a torn theatre ticket, damp with rain and smelling faintly of bitter almonds and smoke. Somewhere upstairs, a floorboard groaned, though all twelve suspects swore they had remained together since dinner in the drawing room. Vale removed his hat, smiled politely, and asked whether anyone wished to confess before breakfast complicated matters for everyone present. No one answered, but the stopped clocks began ticking again, each second sounding like a careful footstep behind locked doors.
created_at"2026-04-24T21:32:52.164Z" 4/24/2026, 9:32:52 PM
model"openai/gpt-5.5-20260423"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency12873
moderation_latency(null)
generation_time14019
tokens_prompt46
tokens_completion573
native_tokens_prompt41
native_tokens_completion967
native_tokens_completion_images0
native_tokens_reasoning765
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
num_fetches(null)
web_search_engine(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"completed"
usage0.029215
router(null)
provider_responses
0
endpoint_id"58e5b336-423e-430b-a2ab-8bc353f0c51b"
id"resp_0ff5a39bf274ae710169ebe1843fe48193a9f0dde72bc35170"
is_byokfalse
latency310
model_permaslug"openai/gpt-5.5-20260423"
provider_name"OpenAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.1; linux; x64))"
http_referer(null)
request_id"req-1777066372-XqBsdzlQp8crKtOV7ifM"
session_id(null)
api_type"completions"
id"gen-1777066372-Hw6CDLkTZx0Yy4mWsSF9"
upstream_id"resp_0ff5a39bf274ae710169ebe1843fe48193a9f0dde72bc35170"
total_cost0.029215
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
response_cache_source_id(null)

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