Run: 2026-10-08-01M4DZVTNNG1HBJJS102CBER6R

Run Details

Duration:
2m 28s
Cost:
$0.020778
Provider:
Claude Platform on AWS

Evaluation summary

Score Evaluator
Details Link
90.00% 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
The rain had been drumming on Blackwood Manor since midnight. Inspector Mara Quill arrived at dawn, soaked to the skin. Edmund Garrow lay face down before the cold library fireplace. Blood had pooled beneath his head, dark and already drying. Shards of crystal glittered across the Persian rug near him. Two brandy glasses stood on the mantel, one half full. The grandfather clock had stopped at a quarter past midnight. Beyond the desk, French doors hung open onto the garden. Muddy footprints led from those doors straight to the hearth. Sergeant Tom Reddick whispered, "Nobody has touched a single thing." Mara knelt beside the body and studied the victim's hands. Ink stained his right fingers, though he never wrote letters. In the grate, one scrap of paper survived the flames. Mara lifted it free, and one legible word read Julian. Behind her, a loose floorboard creaked beneath a hurried step. Vivienne Garrow stood frozen in the doorway, wrapped in silk. Her gaze found the body, then lingered on the scrap. "Forgive me, madam, but where exactly were you last night?" Her lips barely moved as she answered, calm and precise. "Asleep upstairs, Inspector, in a separate bedroom for three years." Mara noticed fresh mud darkening the hem of Vivienne's gown. Somewhere above them, a door had clicked shut very softly.
created_at"2026-10-08T14:49:47.969Z" 10/8/2026, 2:49:47 PM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2544
moderation_latency(null)
generation_time148431
tokens_prompt46
tokens_completion5132
native_tokens_prompt62
native_tokens_completion41543
native_tokens_completion_images(null)
native_tokens_reasoning41054
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"
usage0.0207777
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791470987-uoy42aeHrR5E6rvhtZbv"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791470987-69FEoqjrLtNboWEoWPNG"
upstream_id"msg_011CfpxQ237CA8dLbVqq3SPC"
provider_responses
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endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfpxQ237CA8dLbVqq3SPC"
is_byokfalse
latency858
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0207777
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
90.00% Matches word count n/a
neededCleanfalse
sentences20
wordCounts
010
110
210
310
410
510
610
710
810
920
1010
1110
1210
1310
1410
1510
1620
1710
1810
1910