Run: 2026-07-25-01KYCPNAKD54B26H8A6H05GE4K

Run Details

Duration:
9.6s
Cost:
$0.009850
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
84.26% 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 rain had been falling on Ashcombe Manor for three days, softening the lawns into something that swallowed footprints whole. Inspector Vale arrived at half past six, when the light was failing and the gravel drive shone like wet coal. Nobody came out to meet him, though he counted seven windows lit, and behind one of them a curtain twitched. The front door stood open six inches, which struck him as an invitation nobody living had bothered to extend. Inside, the hall smelled of beeswax, woodsmoke, and something faintly sweeter that he chose, for the moment, not to name. A grandfather clock near the staircase had stopped at twenty minutes past four, its pendulum hanging perfectly, unnaturally still. On the fourth step lay a single pearl earring, and on the sixth a smear the color of rust. Vale climbed slowly, counting stairs the way other men count prayers, and stopped where the landing turned toward the library. The door was locked from within, and beneath it a thin dark line was still creeping across the polished boards. He knocked twice, said his name and rank clearly, then heard a woman laughing somewhere far above his head.
created_at"2026-07-25T13:15:32.342Z" 7/25/2026, 1:15:32 PM
model"anthropic/claude-opus-5-20260723"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1919
moderation_latency(null)
generation_time9536
tokens_prompt46
tokens_completion294
native_tokens_prompt60
native_tokens_completion382
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"
usage0.00985
router(null)
provider_responses
0
endpoint_id"76cb4608-f48c-483d-8da8-9957fb44244e"
id"msg_011CdNqYSDGqStA1DSa3oWYX"
is_byokfalse
latency1919
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-1784985332-z7wOMkeckcztD4C5pvum"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1784985332-258jUMISkK84C9Ft3YWp"
upstream_id"msg_011CdNqYSDGqStA1DSa3oWYX"
total_cost0.00985
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
84.26% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
020
120
220
319
420
519
619
720
820
919