Run: 2026-03-18-01KM08NWA0C0DWT6YEV69H84F8

Run Details

Duration:
2.0s
Cost:
$0.000188
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
97.41% 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
Detectives arrived at dawn, where a museum exhibit lay shattered. The curator screamed softly, then collapsed beside the glass vitrine. Rain tapped windows, while guards checked keys and badge logs. Detective Vale examined footprints leading toward the locked gallery door. Forensics noted no blood, yet the victim's face smiled unnaturally. The curator insisted everyone attended; only one staffer vanished earlier. A clock chimed midnight, though witnesses swore it stopped. Inside the display, a locket held ash instead of jewels. Vale questioned the guard, who trembled when asked about footsteps. Above them, silence pressed down, like secrets sealed in stone.
created_at"2026-03-18T10:43:18.987Z" 3/18/2026, 10:43:18 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1148
moderation_latency(null)
generation_time1852
tokens_prompt46
tokens_completion178
native_tokens_prompt41
native_tokens_completion144
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"
usage0.0001882
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_0d5ab35346e9959a0169ba81c710d881978913b6d5cb1e68dd"
is_byokfalse
latency227
model_permaslug"openai/gpt-5.4-nano-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-1773830598-CZsunCWORoq8T3ziJBdi"
upstream_id"resp_0d5ab35346e9959a0169ba81c710d881978913b6d5cb1e68dd"
total_cost0.0001882
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
97.41% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
010
110
210
310
410
510
69
710
810
910