Run: 2026-07-01-01KWEABJ6QPCM5AB5RTFGJ8ZB0

Run Details

Duration:
8.5s
Cost:
$0.004650
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
0.00% 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 Last Guest Rain hammered the windows of Blackwood Manor as thunder rolled across the darkened valley below. Detective Elena Marsh pulled her coat tighter, stepping carefully across the gravel driveway toward the entrance. The butler, pale and trembling, waited at the door with an unlit lantern in hand. "She's in the library," he whispered, his voice barely audible above the storm outside. Elena nodded once and followed him through corridors lined with portraits of scowling ancestors. The air smelled of old wood, cigar smoke, and something faintly metallic beneath it. Lord Ashford's body lay slumped across his mahogany desk, blood pooling on papers. His eyes stared blankly at the ceiling, frozen in an expression of pure terror. Seven guests remained in the manor, each with secrets worth killing to protect. The storm had knocked out the phone lines hours before anyone noticed the murder. No one could leave until morning, trapped with a killer among them. Elena knelt beside the body, examining the peculiar wound just above his collar. "This wasn't a simple robbery," she muttered, noting the missing signet ring. Someone in this house had planned this murder with meticulous, chilling precision. She stood slowly, turning to face the nervous crowd gathering in the doorway. "One of you," she said quietly, "is a murderer."
created_at"2026-07-01T07:47:34.758Z" 7/1/2026, 7:47:34 AM
model"anthropic/claude-sonnet-5-20260630"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1602
moderation_latency(null)
generation_time8480
tokens_prompt46
tokens_completion337
native_tokens_prompt60
native_tokens_completion453
native_tokens_completion_images(null)
native_tokens_reasoning0
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"
usage0.00465
router(null)
provider_responses
0
endpoint_id"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id"msg_01DbrS4fmHnHaxbkfL9gtBeT"
is_byokfalse
latency1602
model_permaslug"anthropic/claude-sonnet-5-20260630"
provider_name"Amazon Bedrock"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.17.0; linux; x64))"
http_referer(null)
request_id"req-1782892054-w4idSbJy39dN7UyJdoht"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1782892054-xfRDij9alXKvxdgGx5oK"
upstream_id"msg_01DbrS4fmHnHaxbkfL9gtBeT"
total_cost0.00465
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
0.00% Matches word count n/a
neededCleanfalse
sentences17
wordCounts
04
115
216
315
414
514
614
713
814
913
1014
1112
1213
1312
1412
1513
169