Run: 2026-03-09-01KKAC2SQ1NY6P6JS7VY1GNH3N

Run Details

Duration:
14.5s
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 manor windows while Detective Mara Vale arrived, summoned before dawn by a voice trembling through static alone. Inside, the grandfather clock coughed midnight again, though morning neared, and every servant avoided the crimson smudge on marble stairs. Lord Bellrose lay in the library, smiling faintly, a silver letter opener nestled beneath his ribs like punctuation mark itself. On the desk, seven chess pieces formed a crooked circle around spilled brandy, ash, and one perfectly polished cufflink nearby. Mara noted the locked door, the unlatched window, and the family's silence, which sounded rehearsed, devotional, almost grateful to her. Then the housekeeper whispered that Bellrose had predicted his murderer at supper, naming everyone present except himself before the storm.
created_at"2026-03-09T22:39:30.538Z" 3/9/2026, 10:39:30 PM
model"openai/gpt-5.4-20260305"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency13740
moderation_latency(null)
generation_time14436
tokens_prompt46
tokens_completion207
native_tokens_prompt41
native_tokens_completion924
native_tokens_completion_images0
native_tokens_reasoning758
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_0c5c1f88288e62bc0169af4c229a6c81969711a4685fc5797b"
is_byokfalse
latency351
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-1773095970-9WcRHmPbINbpZTtLf1sx"
upstream_id"resp_0c5c1f88288e62bc0169af4c229a6c81969711a4685fc5797b"
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
sentences6
wordCounts
020
120
220
320
420
520