Run: 2026-04-24-01KPZTW0M57H6R9Y7F21JXX19A

Run Details

Duration:
6.9s
Cost:
$0.011375
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
80.15% 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 the cobblestones outside Ravenscroft Manor as Detective Miles Harrow stepped from his car into the howling October night. The front door stood ajar, spilling amber light across the wet stone steps where a single black glove lay abandoned. Inside, the butler waited with trembling hands, his silver tray forgotten on a table beside an overturned crystal wine decanter. "He's in the library, sir," the old man whispered, eyes darting toward the staircase as thunder rattled the tall leaded windows. Harrow followed the narrow corridor past oil paintings whose painted eyes seemed to track his slow, deliberate progress through the shadows. Lord Ashworth sat slumped behind his mahogany desk, a jeweled letter opener buried deep within his starched white dress shirt. Blood had pooled across an unfinished letter, staining the words until only one legible phrase remained: "I know your secret." Three guests huddled near the fireplace, each clutching a drink, each wearing expressions that blended genuine shock with something far uglier. Harrow removed his damp hat, surveyed the room carefully, and noted that every single window had been locked from inside. "Nobody leaves this house tonight," he announced quietly, and somewhere upstairs, a floorboard creaked beneath the weight of hidden footsteps.
created_at"2026-04-24T13:29:05.426Z" 4/24/2026, 1:29:05 PM
model"anthropic/claude-4.7-opus-20260416"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1865
moderation_latency(null)
generation_time6804
tokens_prompt46
tokens_completion329
native_tokens_prompt65
native_tokens_completion442
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"
usage0.011375
router(null)
provider_responses
0
endpoint_id"0fa65117-00d9-4835-808d-9b68041d9ce4"
id"c2df8b0d-4a42-4f25-b0f4-fd78b4df0c74"
is_byokfalse
latency1865
model_permaslug"anthropic/claude-4.7-opus-20260416"
provider_name"Amazon Bedrock"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.1; linux; x64))"
http_referer(null)
request_id"req-1777037345-bn6L3gOavRYpSGEILgIl"
session_id(null)
api_type"completions"
id"gen-1777037345-2fPJ0Ofs9YBYGgf3MHRW"
upstream_id"c2df8b0d-4a42-4f25-b0f4-fd78b4df0c74"
total_cost0.011375
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
80.15% Matches word count n/a
neededCleanfalse
sentences9
wordCounts
020
120
220
321
421
520
641
720
820