Run: 2026-03-11-01KKFKFFB0HZ47A2C2FVT7XT1Q

Run Details

Duration:
14.1s
Cost:
$0.000000
Provider:
Stealth

Evaluation summary

Score Evaluator
Details Link
19.63% 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 hammered the windows of Blackmoore Manor as Detective Harding stepped from his black sedan in the cold midnight hour. The constable awaited him at the iron gate, his lantern casting trembling shadows across the frozen gravel path. "Terrible business, sir," the officer whispered, clutching his hat with trembling fingers. "The missus is dead." They found her in the library, sprawled across Persian carpet, her silk dressing gown soaked dark with spreading crimson. Lady Pemberton's throat had been sliced cleanly; no defensive wounds marred her unblemished porcelain hands or silk gown. Harding knelt beside the body, studying the room with practiced precision—nothing out of place, everything unsettlingly deliberate. On the mahogany desk lay a leather journal, open to a page of frantic handwriting dated three hours prior. The final entry read simply: "I know what Marcus has done. I cannot forgive him. I refuse silence." Harding closed the journal slowly, his jaw tightening as thunder rattled the ancient windowpanes above them both. A silver letter opener rested beside the blood-soaked carpet, its bone handle curiously wiped clean of fingerprints entirely. "Where is Marcus now?" Harding asked without looking up, his voice cutting through the oppressive silence around them. "In his study, sir. He's been there all evening. The door was locked from inside," the constable said. Harding rose to his full height, his sharp eyes catching something almost imperceptible near the window's heavy curtain. He crossed the room in four measured steps and drew the curtain aside, revealing a muddy boot print. Someone had entered through the balcony. Someone who did not know Lady Pemberton kept the library door bolted nightly. Harding turned to face the assembled household—seven pale faces watching him with fear and suspicion and disbelief. "The door was locked from inside," he repeated slowly, "yet someone entered this room and murdered Lady Pemberton tonight." No one spoke. Thunder rolled across the manor rooftops like distant gunfire announcing the violence soon to follow. "Ladies and gentlemen," Harding announced, "no one leaves this house until I discover precisely who murdered Lady Pemberton."
created_at"2026-03-11T23:24:58.091Z" 3/11/2026, 11:24:58 PM
model"openrouter/healer-alpha"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency496
moderation_latency(null)
generation_time13983
tokens_prompt46
tokens_completion2218
native_tokens_prompt2119
native_tokens_completion1879
native_tokens_completion_images(null)
native_tokens_reasoning1631
native_tokens_cached2078
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"stop"
usage0
router(null)
provider_responses(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.0; linux; x64))"
http_referer(null)
api_type"completions"
id"gen-1773271498-u4qjiDSLo5W5vLmKFFzq"
upstream_id"gen-1773271498-u4qjiDSLo5W5vLmKFFzq"
total_cost0
cache_discount(null)
upstream_inference_cost0
provider_name"Stealth"

Evaluation details

Result Evaluator Details Meta Data
19.63% Matches word count n/a
neededCleanfalse
sentences22
wordCounts
020
118
212
34
419
518
618
719
818
917
1018
1118
1218
1318
1418
156
1613
1718
1819
193
2015
2118