Run: 2026-03-18-01KM0ABTWK82RGQWJJW0WKGARR

Run Details

Duration:
1.5s
Cost:
$0.000593
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
85.60% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 10 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Rain stitched the harbor into silver shrouds before dawn arrived. Detective Mara Vale climbed the steps toward Blackthorn Manor. The butler waited, pale and trembling, beneath the candlelit archway. Inside, the library smelled of smoke, roses, and secrets. Lord Blackthorn lay beside the hearth, one hand clutching letters. His eyes stared upward, accusing someone already gone elsewhere. Mara noticed muddy footprints crossing the Persian rug silently. A shattered window whispered of intrusion, but not escape. Then she saw the clock: it had stopped at midnight.
created_at"2026-03-18T11:12:47.009Z" 3/18/2026, 11:12:47 AM
model"openai/gpt-5.4-mini-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency818
moderation_latency(null)
generation_time1414
tokens_prompt46
tokens_completion151
native_tokens_prompt41
native_tokens_completion125
native_tokens_completion_images0
native_tokens_reasoning0
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"
usage0.00059325
router(null)
provider_responses
0
endpoint_id"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id"resp_0235441f037024710169ba88af12148190a317d69ec453dd10"
is_byokfalse
latency168
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-1773832367-B51k20meK0r1QKnSXqAz"
upstream_id"resp_0235441f037024710169ba88af12148190a317d69ec453dd10"
total_cost0.00059325
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
85.60% Matches word count n/a
neededCleanfalse
sentences9
wordCounts
010
19
210
39
410
59
69
79
810