Run: 2026-07-01-01KWE8X5ST930F2VQY9XRA4X25

Run Details

Duration:
9.0s
Cost:
$0.004890
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 Vanishing Hour Rain fell steadily on the manor's ancient roof, drowning out whatever sounds waited inside its walls. Detective Sarah Chen parked her car beneath the crooked oak tree that guarded the entrance. The butler stood motionless at the door, his face pale as the storm clouds above. "She's in the library," he whispered, gesturing toward the hallway with a trembling hand. Sarah nodded once and stepped past him, her shoes echoing against the marble floor. The library door was open, revealing a scene that made her stomach tighten. Lord Ashford lay sprawled across his desk, blood pooling beneath his silver head. Books had fallen from their shelves, scattered like broken promises across the Persian rug. A single candle flickered on the windowsill, casting shadows that danced with secrets. Sarah knelt beside the body, careful not to disturb the evidence surrounding it. The murder weapon was nowhere in sight, which troubled her more than expected. Whoever did this had planned carefully, leaving no obvious trace behind. She glanced toward the window, noticing it was locked from inside. Outside, thunder rumbled ominously, matching the storm gathering within her thoughts. Six guests remained trapped in this house, and one of them was lying. Sarah stood slowly, smoothing her coat, already calculating her first move forward. The night had only begun, and truth demanded she uncover it.
created_at"2026-07-01T07:22:14.726Z" 7/1/2026, 7:22:14 AM
model"anthropic/claude-sonnet-5-20260630"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1612
moderation_latency(null)
generation_time8973
tokens_prompt46
tokens_completion361
native_tokens_prompt60
native_tokens_completion477
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"
usage0.00489
router(null)
provider_responses
0
endpoint_id"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id"msg_01Fh3asUK3jgytqrQGyLo9tj"
is_byokfalse
latency1612
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-1782890534-BLEVFHYnRfalJr4JzrGo"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1782890534-wWAHpo9uv353KwmqETIc"
upstream_id"msg_01Fh3asUK3jgytqrQGyLo9tj"
total_cost0.00489
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
sentences18
wordCounts
04
116
215
315
414
514
613
713
814
913
1013
1113
1211
1311
1411
1513
1612
1711