Run: 2026-03-18-01KM08594546FY6XF62VSEXT8N

Run Details

Duration:
10.8s
Cost:
$0.003644
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 the harbor into silver threads as Detective Mara Vale stepped from her car, already knowing someone was dead. The lighthouse bell had stopped at midnight, and now its silence pressed against the docks like a held breath there. A body lay beneath the fishing nets, face turned to the rain, one hand clutching a brass room key firmly. Mara knelt beside him, noticing the puncture wound hidden under seawater, and the impossible detail everyone else had missed completely. Inside the darkened inn, a piano played one uncertain note, and Mara knew the killer was still listening upstairs closely.
created_at"2026-03-18T10:34:15.06Z" 3/18/2026, 10:34:15 AM
model"openai/gpt-5.4-mini-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency10407
moderation_latency(null)
generation_time10610
tokens_prompt46
tokens_completion580
native_tokens_prompt41
native_tokens_completion803
native_tokens_completion_images0
native_tokens_reasoning674
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"
usage0.00364425
router(null)
provider_responses
0
endpoint_id"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id"resp_06fb3ee66b823cc20169ba7fa71f888197b5727952908bd59f"
is_byokfalse
latency193
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-1773830055-qObrrBr4GfpnWm52KWtT"
upstream_id"resp_06fb3ee66b823cc20169ba7fa71f888197b5727952908bd59f"
total_cost0.00364425
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