Run: 2026-09-29-01M3P2FY624KABAW9Y737VQQ5D

Run Details

Duration:
16.4s
Cost:
$0.022404
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 Blackthorn Manor the night Lord Edmund Harrow was found dead in his locked private study. Inspector Mara Quill arrived at midnight, shaking water from her coat and studying the crowd gathered in the marble hall. Five guests stood beneath the chandelier, each wearing the same pale expression of shock that Mara had learned to distrust. The butler, Mr. Pemberton, explained that the study door had been bolted from inside, with the only key still missing. Mara climbed the staircase, counting every step, because she believed murderers often left their first mistakes closest to the crime. Inside the study, Lord Harrow slumped across his mahogany desk, one hand still clutching a torn scrap of blue silk. The window was latched, the fire had burned to embers, and a single wine glass sat untouched beside the body. Mara knelt, sniffed the glass, and caught the bitter almond scent that told her this death was never an accident. Behind her, the grandfather clock chimed once, and every guest downstairs fell suddenly silent as though waiting for a confession. Mara stood, brushed off her knees, and whispered that somebody in this house had just become a very careful liar.
created_at"2026-09-29T07:53:57.702Z" 9/29/2026, 7:53:57 AM
model"anthropic/claude-sonnet-5.5-20260928"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3841
moderation_latency(null)
generation_time16385
tokens_prompt46
tokens_completion675
native_tokens_prompt62
native_tokens_completion2228
native_tokens_completion_images(null)
native_tokens_reasoning1833
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"
usage0.022404
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1790668437-YiilszeDqudZvhoKZbcm"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790668437-s9juspDJXywCxZWx4I28"
upstream_id"msg_011CfXNQaELMDk6HJA4uJNYg"
provider_responses
0
endpoint_id"99aaad94-923b-4fc1-b763-271ed5486f7a"
id"msg_011CfXNQaELMDk6HJA4uJNYg"
is_byokfalse
latency614
model_permaslug"anthropic/claude-sonnet-5.5-20260928"
provider_name"Claude Platform on AWS"
status200
total_cost0.022404
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
sentences10
wordCounts
020
120
220
320
420
520
620
720
820
920