Run: 2026-10-08-01M4DYHFWCA3W6YHD64DWVQD8G

Run Details

Duration:
2m 23s
Cost:
$0.019011
Provider:
Claude Platform on AWS

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 10 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Rain hammered against the windows of Blackwood Manor all night. By dawn the storm had surrendered, leaving the estate hushed. Martha Greaves came downstairs early, eager to light the hearth. The library door was locked, which Blackwood would never tolerate. She knocked twice, then called his name, receiving no reply. Silence answered her, thick and wrong, like a held breath. She fetched the spare key from its hook, hands trembling. The key turned stiffly, and the heavy door groaned open. Lord Edmund Blackwood sat slumped across his mahogany desk, motionless. A crystal brandy glass lay shattered beside his polished boot. Her scream tore through the sleeping house, sharp as glass. Arthur Finch, the butler, arrived minutes later, buttoning his coat. He took one look at the body and turned ashen. His gaze drifted to the window, bolted tight from within. The hall clock struck seven, utterly indifferent to the horror. Inspector Helen Marsh arrived shortly after, soaked to the bone. Helen knelt beside the desk and studied the broken crystal. Beneath his cold fingers rested a single queen of spades. The faint scent of bitter almonds hung in the air. Poison, she thought, and someone had planned every last detail. Helen asked, "Who else has a key to this room?" "Only the family and I have keys, Inspector," Arthur whispered. Helen noticed that one of his waistcoat buttons was misaligned. The killer, Helen suspected, had not yet left this house.
created_at"2026-10-08T14:26:40.662Z" 10/8/2026, 2:26:40 PM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2443
moderation_latency(null)
generation_time142683
tokens_prompt46
tokens_completion5714
native_tokens_prompt62
native_tokens_completion38009
native_tokens_completion_images(null)
native_tokens_reasoning37490
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
num_fetches(null)
web_search_engine(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"end_turn"
service_tier"default"
usage0.0190107
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791469600-C3FIFs4jWBGbwev8Kdvs"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791469600-BGoVooyFJYI2Xe5CyO72"
upstream_id"msg_011CfpvdkW7sy7K3jWjGrqat"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfpvdkW7sy7K3jWjGrqat"
is_byokfalse
latency826
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0190107
cache_discount(null)
upstream_inference_cost0
provider_name"Claude Platform on AWS"
response_cache_source_id(null)
data_region"global"
workspace_id"97e315e5-d303-487d-83c1-83180e8a13d4"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences24
wordCounts
010
110
210
310
410
510
610
710
810
910
1010
1110
1210
1310
1410
1510
1610
1710
1810
1910
2010
2110
2210
2310