Run: 2026-03-18-01KM09S2H89T4E9SHJHTHEY2Y9

Run Details

Duration:
11.2s
Cost:
$0.006614
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 silver lines across Blackthorn Manor as midnight swallowed the gardens, and the last guests whispered toward the ballroom. Inside, chandeliers trembled above polished floors, where candlelight shivered over portraits, and everyone avoided the grand staircase as if cursed. Detective Mara Venn arrived late, carrying wet newspapers and a patience already frayed by the constable's cryptic summons outside tonight. At the center of the room, Sir Alistair's champagne glass lay shattered beside his body, still warm to the touch. No one admitted hearing the shot, though the open window breathed in storm air and the scent of garden roses. Mara noticed three things: the missing watch, the ash on the carpet, and the smile on the dead man's face.
created_at"2026-03-18T11:02:32.246Z" 3/18/2026, 11:02:32 AM
model"openai/gpt-5.4-mini-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency10801
moderation_latency(null)
generation_time11032
tokens_prompt46
tokens_completion562
native_tokens_prompt41
native_tokens_completion1463
native_tokens_completion_images0
native_tokens_reasoning1307
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"
usage0.00661425
router(null)
provider_responses
0
endpoint_id"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id"resp_01d4a0c54b5877f40169ba8648564081939c11c2d646547c93"
is_byokfalse
latency329
model_permaslug"openai/gpt-5.4-mini-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-1773831752-10DBehuGtR6rgXj0s2Ex"
upstream_id"resp_01d4a0c54b5877f40169ba8648564081939c11c2d646547c93"
total_cost0.00661425
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