Run: 2026-07-25-01KYCRN1G5HQZ0MKVQEVVF9P4C

Run Details

Duration:
49.2s
Cost:
$0.124875
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
88.89% 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 cold rain had been falling on Ashcombe since Tuesday, and by Friday morning the river had swallowed the footbridge. Inspector Halloran arrived at half past six, coat collar up, a dead cigarette forgotten between the fingers of his glove. The body lay face down in the reeds below the mill, with one shoe missing and the other absurdly polished. Sergeant Pike held the umbrella over them both and said nothing, which Halloran counted among the man's very finest qualities. She was young, perhaps thirty, and someone had taken great care to arrange her hair before the river water came. Halloran crouched down and studied the pale band where a ring had very recently been worn, then looked at Pike. Someone reported this before dawn, from the telephone box outside the church, and refused to give his name at all. "A village of four hundred souls," Pike said quietly, "and not a single one will admit to ever knowing her." Halloran looked up the hill toward the lit windows, counting slowly, and found there were precisely eleven of them burning. At this hour, in this weather, eleven households awake meant eleven people who already knew all about the girl's drowning.
created_at"2026-07-25T13:50:20.173Z" 7/25/2026, 1:50:20 PM
model"anthropic/claude-opus-5-20260723"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4318
moderation_latency(null)
generation_time49081
tokens_prompt46
tokens_completion1115
native_tokens_prompt60
native_tokens_completion4983
native_tokens_completion_images(null)
native_tokens_reasoning822
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"
usage0.124875
router(null)
provider_responses
0
endpoint_id"76cb4608-f48c-483d-8da8-9957fb44244e"
id"msg_011CdNtCMgiEmUfpBcHVngHP"
is_byokfalse
latency1607
model_permaslug"anthropic/claude-opus-5-20260723"
provider_name"Amazon Bedrock"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.18.0; linux; x64))"
http_referer(null)
request_id"req-1784987420-jQdONf885VAS2tSo6wlC"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1784987420-djSLRtJNnFJ8un2NBMJ0"
upstream_id"msg_011CdNtCMgiEmUfpBcHVngHP"
total_cost0.124875
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
88.89% Matches word count n/a
neededCleanfalse
sentences9
wordCounts
020
120
220
320
420
520
620
740
820