Run: 2026-07-01-01KWE8VTHSH0QAF69F7V2SSAZ6

Run Details

Duration:
53.6s
Cost:
$0.077960
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 relentlessly against the old mansion's tall, narrow windows as thunder rolled slowly across the darkened, silent valley below. Detective Sarah Miles stood motionless at the old threshold, staring silently into the room's oppressive, suffocating darkness ahead of her. A single candle flickered weakly upon the old mahogany desk, casting long, twisted shadows across the entire silent, empty room. There, sprawled awkwardly across the faded Persian rug, lay the lifeless, bloodied body of old Lord Ashford himself, utterly motionless. Blood pooled darkly beneath his silver head, glistening faintly in the flickering, slowly dying candlelight upon the old wooden floorboards. Detective Miles knelt slowly beside the corpse, carefully noting the peculiar bruising around his pale, thin, wrinkled neck and throat. No weapon lay nearby, only deep silence and the storm's persistent, eerie howl outside the tall, broken bedroom window pane. Someone within this grand old house, she realized grimly, had already gotten away with cold-blooded, calculated murder this very night.
created_at"2026-07-01T07:21:30.433Z" 7/1/2026, 7:21:30 AM
model"anthropic/claude-sonnet-5-20260630"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency5828
moderation_latency(null)
generation_time53520
tokens_prompt46
tokens_completion801
native_tokens_prompt60
native_tokens_completion7784
native_tokens_completion_images(null)
native_tokens_reasoning529
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"
usage0.07796
router(null)
provider_responses
0
endpoint_id"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id"msg_01SJBSQjZodi5f8hMjkeyDyE"
is_byokfalse
latency2612
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-1782890490-xJQuuqiRYm4a9dtaNeDm"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1782890490-0UMypJn9WaadiSW80ZFL"
upstream_id"msg_01SJBSQjZodi5f8hMjkeyDyE"
total_cost0.07796
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
sentences8
wordCounts
020
120
220
320
420
520
620
720