Run: 2026-03-09-01KKABYY6BBMJ8HSCGZFPHMMER

Run Details

Duration:
14.1s
Cost:
$0.013962
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 windows of Blackthorn Hall as Inspector Vale arrived, carrying a damp overcoat and news nobody expected tonight. Inside, the birthday guests stood frozen beneath glittering chandeliers, surrounding Sir Alistair's body like mourners rehearsing guilt for the police. A violin still hummed from the gallery above, its final note trembling longer than the scream that summoned everyone downstairs. No blood stained the marble floor, yet a silver dessert fork protruded from his throat with deliberate, obscene elegance there. Lady Beatrice clutched her pearls, the butler avoided eye contact, and the heir smiled briefly before remembering sorrow properly now. Vale removed his gloves, studied the clock stopped at nine, and wondered who had silenced it before dinner was served. On the mantel, seven wax candles burned evenly, although one chair was empty and one place setting remained untouched tonight. When thunder rolled overhead, Vale announced the doors were locked, and every face revealed relief before fear reclaimed it again.
created_at"2026-03-09T22:37:24.054Z" 3/9/2026, 10:37:24 PM
model"openai/gpt-5.4-20260305"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency13601
moderation_latency(null)
generation_time13788
tokens_prompt46
tokens_completion650
native_tokens_prompt41
native_tokens_completion924
native_tokens_completion_images0
native_tokens_reasoning713
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"
usage0.0139625
router(null)
provider_responses
0
endpoint_id"9ff5625c-403f-4d7f-b895-58ac7295062c"
id"resp_0e0c4db448034fd20169af4ba41f548197b6694e551d455903"
is_byokfalse
latency168
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-1773095844-eBn5VDbtedpUdePyGGYt"
upstream_id"resp_0e0c4db448034fd20169af4ba41f548197b6694e551d455903"
total_cost0.0139625
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