Run: 2026-10-08-01M4DAJQ5D47V2WA9W6A4Q853N

Run Details

Duration:
11.9s
Cost:
$0.001474
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
The rain had not stopped for three long days, and Detective Mara Quinn resented every single minute of the downpour. Water streamed down the tall windows of Ashford Manor, blurring the old portraits that watched her from the dim hallway. Lord Edmund Ashford lay dead at the foot of the grand staircase, a silver letter opener jutting from his chest. Quinn knelt beside the body, noting the muddy footprints that led away from the study door toward the servants' kitchen. Nobody in the household had admitted to leaving their rooms after midnight, which made every one of them a suspect. Quinn glanced at the antique clock above the mantel, its brass hands frozen stubbornly at twenty past eleven last night. Someone had carefully wound that clock, or else someone had badly wanted the local constables to believe one convenient lie. Quinn pulled on her gloves, took a breath, and stepped very carefully over the blood toward the waiting chaos below.
created_at"2026-10-08T08:37:49.368Z" 10/8/2026, 8:37:49 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency11883
moderation_latency(null)
generation_time11883
tokens_prompt46
tokens_completion238
native_tokens_prompt62
native_tokens_completion2936
native_tokens_completion_images(null)
native_tokens_reasoning2621
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"
usage0.0014742
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791448669-fv6vGhs6rmbmIxsFwTUA"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791448669-zvhKuHTG502tPWd0yTrX"
upstream_id"msg_011CfpU2oyihkTBiBkU7WZsH"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfpU2oyihkTBiBkU7WZsH"
is_byokfalse
latency720
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0014742
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
sentences8
wordCounts
020
120
220
320
420
520
620
720