Run: 2026-07-25-01KYCR9GXV5339HW7NFE87TXBD

Run Details

Duration:
19.9s
Cost:
$0.044175
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 10 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Rain hammered the slate roof of Ashcombe Hall all night. By dawn the storm had passed, leaving the gardens drowned. Mrs. Pell found the library door locked from the inside. She knocked twice, then a third time, calling his name. Nothing answered her but the tall clock in the corridor. The gardener came with tools and forced the brass lock. Wood splintered, hinges groaned, and the heavy door swung inward. Sir Edmund Ashcombe sat upright in his tall leather chair. His fountain pen rested neatly beside an unfinished letter, uncapped. A single red thread of blood crossed his starched collar. The windows were latched, the chimney cold, the curtains undisturbed. Footprints, dried to grey mud, led away from the desk. They stopped halfway across the room and simply went nowhere. Mrs. Pell screamed once and then grew terribly, carefully quiet. The gardener stared at the carpet and said one word. Murder, he whispered, though nobody else had used that word. Outside, church bells counted seven over the drowned rose beds.
created_at"2026-07-25T13:44:02.755Z" 7/25/2026, 1:44:02 PM
model"anthropic/claude-opus-5-20260723"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4407
moderation_latency(null)
generation_time19835
tokens_prompt46
tokens_completion570
native_tokens_prompt60
native_tokens_completion1755
native_tokens_completion_images(null)
native_tokens_reasoning312
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"
usage0.044175
router(null)
provider_responses
0
endpoint_id"76cb4608-f48c-483d-8da8-9957fb44244e"
id"msg_011CdNsiYckQNAN42o6Gwr1h"
is_byokfalse
latency1570
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-1784987042-XjoQGOBfVIVz9N3wesDj"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1784987042-xBgGi5kUJ7rgrPJ4GPAc"
upstream_id"msg_011CdNsiYckQNAN42o6Gwr1h"
total_cost0.044175
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
sentences17
wordCounts
010
110
210
310
410
510
610
710
810
910
1010
1110
1210
1310
1410
1510
1610