Run: 2026-03-18-01KM0ABRCM1BNRGDW3A6PRBJR1

Run Details

Duration:
7.9s
Cost:
$0.004724
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 guests laughed too loudly, pretending the storm had not trapped them there. Inside the ballroom, candles trembled beside a grand piano, and every mirror reflected faces that already seemed guilty tonight, collectively. At midnight, the housekeeper screamed from the library, and the music stopped so abruptly that even thunder seemed to listen. When they found Lord Ashcombe sprawled beneath the portraits, a pearl-handled letter opener gleamed in his chest like a secret. Detective Mara Vale arrived before dawn, noting every shutter, stain, and alibi, while the corpse's hand still clutched a rose.
created_at"2026-03-18T11:12:44.45Z" 3/18/2026, 11:12:44 AM
model"openai/gpt-5.4-mini-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency7659
moderation_latency(null)
generation_time7806
tokens_prompt46
tokens_completion454
native_tokens_prompt41
native_tokens_completion1043
native_tokens_completion_images0
native_tokens_reasoning908
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"
usage0.00472425
router(null)
provider_responses
0
endpoint_id"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id"resp_0cca483c8e52a4850169ba88ac831c8190bc23f3083e50d1d1"
is_byokfalse
latency247
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-1773832364-bF9WzjPeUa1Y7tqRBtSr"
upstream_id"resp_0cca483c8e52a4850169ba88ac831c8190bc23f3083e50d1d1"
total_cost0.00472425
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences5
wordCounts
020
120
220
320
420