Run: 2026-07-01-01KWE9E77T7MS81XNAE6G8E99X

Run Details

Duration:
9.9s
Cost:
$0.005920
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
0.07% 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 Manor at Midnight Rain hammered the windows of Blackwood Manor as thirteen guests gathered for dinner that fateful evening. Detective Harlow noticed how everyone avoided looking at the empty chair where their host should sit. Lady Winters clutched her pearls, glancing nervously toward the study door that remained firmly closed. The butler, Simmons, hadn't spoken since he discovered something terrible only twenty minutes earlier. Candles flickered across worried faces, casting shadows that seemed to dance with secrets nobody wanted revealed tonight. "Mr. Ashford will join us shortly," Simmons announced, though his trembling voice betrayed the obvious lie. Thunder cracked outside, rattling ancient windows that had witnessed countless family gatherings across three centuries. Nobody moved toward the study, yet everyone's eyes drifted repeatedly toward that ominous, unwelcoming door. Detective Harlow set down his wine glass, sensing danger coiled beneath polite conversation and formal manners. He'd been invited as a guest, not knowing murder would interrupt his quiet weekend retreat. The grandfather clock struck nine, its chimes echoing through halls suddenly heavy with dread. Miss Chen excused herself, claiming she needed fresh air despite the storm raging outside violently. Nobody believed her excuse, but nobody dared question what she might be hiding either. Finally, Harlow rose, walked deliberately toward the study, and grasped the cold brass handle. The door creaked open, revealing Ashford's lifeless body slumped across his mahogany desk ominously. Someone screamed behind him, but Harlow's mind had already begun untangling this house of secrets.
created_at"2026-07-01T07:31:33.255Z" 7/1/2026, 7:31:33 AM
model"anthropic/claude-sonnet-5-20260630"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1634
moderation_latency127
generation_time9734
tokens_prompt46
tokens_completion422
native_tokens_prompt60
native_tokens_completion580
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native_tokens_reasoning0
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
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web_search_engine(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"end_turn"
service_tier"default"
usage0.00592
router(null)
provider_responses
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endpoint_id"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id"msg_01SxebfUqngEmKwMo2i28pgf"
is_byokfalse
latency1630
model_permaslug"anthropic/claude-sonnet-5-20260630"
provider_name"Amazon Bedrock"
status200
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http_referer(null)
request_id"req-1782891093-zgU2Ss5tk1X7L7h3uWnk"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1782891093-DQreL63PyABpEPpnPJXL"
upstream_id"msg_01SxebfUqngEmKwMo2i28pgf"
total_cost0.00592
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"
response_cache_source_id(null)
data_region"global"

Evaluation details

Result Evaluator Details Meta Data
0.07% Matches word count n/a
neededCleanfalse
sentences17
wordCounts
05
116
216
315
414
517
616
715
815
916
1015
1114
1215
1314
1414
1514
1615