Run: 2026-07-01-01KWE9KZ7BZ55JWHJJHNPGCA55

Run Details

Duration:
28.9s
Cost:
$0.036310
Provider:
Amazon Bedrock

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 against the tall windows of the old manor, drowning every sound except the distant rolling thunder far away. Inside, the grand hall stood silent, its usual warmth replaced by an unfamiliar, suffocating sense of quiet, creeping dread tonight. A single lamp flickered near the staircase, casting long, trembling shadows that seemed to move entirely on their own accord. Detective Elena Voss stepped quietly through the heavy doorway, her coat dripping wet, her sharp eyes scanning every corner instantly. She found the old butler waiting nervously near the fireplace, his hands trembling, his face pale as freshly fallen snow. "Lord Ashworth is dead," he whispered hoarsely, his voice barely audible above the fierce storm still raging outside the windows. Elena knelt quietly beside the cold body, already noticing a single, crimson rose resting deliberately upon his lifeless, silent chest.
created_at"2026-07-01T07:34:41.654Z" 7/1/2026, 7:34:41 AM
model"anthropic/claude-sonnet-5-20260630"
app_id182717
external_user(null)
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cancelledfalse
latency3695
moderation_latency(null)
generation_time28870
tokens_prompt46
tokens_completion503
native_tokens_prompt60
native_tokens_completion3619
native_tokens_completion_images(null)
native_tokens_reasoning277
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"
usage0.03631
router(null)
provider_responses
0
endpoint_id"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id"msg_012XG2GayYmvTnNsUny3Tnpb"
is_byokfalse
latency1678
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-1782891281-1vsjxX6iPOLTYTx0f5AK"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1782891281-LrEKxWMGbbc3CRHzQ47w"
upstream_id"msg_012XG2GayYmvTnNsUny3Tnpb"
total_cost0.03631
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
100.00% Matches word count n/a
neededCleanfalse
sentences7
wordCounts
020
120
220
320
420
520
620