Run: 2026-07-25-01KYCQRHTDB3SZM3ZSBD4AFQG4

Run Details

Duration:
41.5s
Cost:
$0.088925
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
The rain had been falling on Ashcombe Manor since Thursday, and by Sunday morning the long gravel drive resembled soup. Inspector Halloway parked beside the cracked fountain, turned off the engine, and sat listening to rain drumming on the roof. Someone had died inside that house, and everyone still breathing would probably spend the whole day lying to her face. The butler, a narrow man named Prentice, opened the door even before she had finished climbing the last stone step. He took her wet coat without comment, as though fresh corpses arrived at Ashcombe every second Sunday, shortly before lunch. Lord Ashcombe lay in the library, face down on the faded Persian carpet, a silver letter opener between his shoulders. Six people had slept under this roof last night, and one of them had used an intimate sort of weapon. Halloway crouched beside the body and noticed at once that the dead man's fingers were stained with wet green ink. The desk held no pen, no inkwell, and no trace at all of whatever he had been writing before dying. Somewhere above her, a woman began laughing, and the thin sound went on much too long to be called grief.
created_at"2026-07-25T13:34:46.612Z" 7/25/2026, 1:34:46 PM
model"anthropic/claude-opus-5-20260723"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency7253
moderation_latency(null)
generation_time41382
tokens_prompt46
tokens_completion681
native_tokens_prompt60
native_tokens_completion3545
native_tokens_completion_images(null)
native_tokens_reasoning392
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"
usage0.088925
router(null)
provider_responses
0
endpoint_id"76cb4608-f48c-483d-8da8-9957fb44244e"
id"msg_011CdNs1biPNzLWcmfoYgad6"
is_byokfalse
latency3114
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-1784986486-YZiKR4tz4iWSdmBSShK9"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1784986486-vXQqo9By5EaocJ6mW21h"
upstream_id"msg_011CdNs1biPNzLWcmfoYgad6"
total_cost0.088925
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
sentences10
wordCounts
020
120
220
320
420
520
620
720
820
920