Run: 2026-10-08-01M4DA9N8WHP8E5CACCFWDSE6F

Run Details

Duration:
14.1s
Cost:
$0.001383
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 had fallen over Ashford Manor since dawn, and nobody in the village dared mention the dead body found upstairs. Detective Inspector Harriet Vance stepped from her battered Morris onto the gravel, pulling her collar tight against the cold wind. Her sergeant, young Tom Pryce, waited beneath the stone portico, clutching a notebook he had already soaked completely through itself. Inside, the house smelled of woodsmoke, wet wool, and something sweeter and far more unsettling that Harriet recognized at once. Lord Edmund Ashford lay slumped across his leather armchair, a silver letter opener jutting obscenely from beneath his left ribs. Every door in Ashford Manor had been locked from the inside, and each guest swore they had heard absolutely nothing.
created_at"2026-10-08T08:32:52.515Z" 10/8/2026, 8:32:52 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2921
moderation_latency(null)
generation_time14107
tokens_prompt46
tokens_completion479
native_tokens_prompt62
native_tokens_completion2753
native_tokens_completion_images(null)
native_tokens_reasoning2486
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"
usage0.0013827
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791448372-T3vzLHVlUc9hzeLK3LIf"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791448372-ghHCJLsvQW1DqaKBR1Wq"
upstream_id"msg_011CfpTevprxBTw9gsNo1hRj"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfpTevprxBTw9gsNo1hRj"
is_byokfalse
latency780
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0013827
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
sentences6
wordCounts
020
120
220
320
420
520