Run: 2026-09-29-01M3P2K50GD1GY56WCRN5TRW9G

Run Details

Duration:
13.3s
Cost:
$0.018114
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 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 Blackwood Manor the night Lord Edmund Harrow was found dead in his own locked study. Inspector Mara Quill arrived at midnight, her boots muddy, her umbrella broken, and her patience worn thin by the storm. The butler, a pale man named Cobb, led her through the grand hallway without once meeting her steady, questioning eyes. Inside the study, Lord Harrow slumped over his desk, one hand still tightly clutching a torn scrap of crimson silk. The door had been bolted from inside, the window latched, and the only key rested in the dead man's pocket. Quill knelt beside the body and noticed that the brandy glass on the desk was still perfectly and suspiciously full. Somewhere upstairs a clock struck twelve, and Quill realized that someone in the house was already quietly lying to her.
created_at"2026-09-29T07:55:42.996Z" 9/29/2026, 7:55:42 AM
model"anthropic/claude-sonnet-5.5-20260928"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3798
moderation_latency(null)
generation_time13274
tokens_prompt46
tokens_completion483
native_tokens_prompt62
native_tokens_completion1799
native_tokens_completion_images(null)
native_tokens_reasoning1515
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"
usage0.018114
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1790668542-ohZYk4cZ8jasldoDCOvi"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790668542-Jo8h8JefXdbyltXUOsFV"
upstream_id"msg_011CfXNYLJtuM6sTefyWPNZ7"
provider_responses
0
endpoint_id"99aaad94-923b-4fc1-b763-271ed5486f7a"
id"msg_011CfXNYLJtuM6sTefyWPNZ7"
is_byokfalse
latency597
model_permaslug"anthropic/claude-sonnet-5.5-20260928"
provider_name"Claude Platform on AWS"
status200
total_cost0.018114
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
sentences7
wordCounts
020
120
220
320
420
520
620