Run: 2026-04-24-01KQ0GAB5G19K3SYVP5D04Z46J

Run Details

Duration:
16.4s
Cost:
$0.073050
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 fell in silver sheets across the cobblestones of Ashgrove Lane, drumming steadily against the windows of number forty-seven. Detective Margaret Holloway arrived just past midnight, her long trench coat heavy with water and her patience thinner than usual. The front door stood slightly ajar, a thin ribbon of yellow light spilling onto the wet stone of the porch. Inside, the grand foyer smelled of old roses, expensive cigars, and something much darker that she recognized far too well. Sir Edmund Cavanaugh lay sprawled beneath the crystal chandelier, a silver letter opener buried deep within his embroidered silk waistcoat. Margaret knelt beside the body, gloved fingers hovering above the wound, reading the scene like a page of familiar text. Five guests remained trapped inside by the storm, and one of them, she knew already, had just committed cold murder.
created_at"2026-04-24T19:43:55.059Z" 4/24/2026, 7:43:55 PM
model"anthropic/claude-4.7-opus-20260416"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2573
moderation_latency(null)
generation_time16311
tokens_prompt46
tokens_completion396
native_tokens_prompt65
native_tokens_completion2909
native_tokens_completion_images(null)
native_tokens_reasoning177
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"
usage0.07305
router(null)
provider_responses
0
endpoint_id"0fa65117-00d9-4835-808d-9b68041d9ce4"
id"8585c4bf-8869-40d4-8c88-cf3e77078e2a"
is_byokfalse
latency858
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-1777059835-lSTj4L9AjvrEw95S6uTS"
session_id(null)
api_type"completions"
id"gen-1777059835-mRweUTMU4ixIN1D3I3hv"
upstream_id"8585c4bf-8869-40d4-8c88-cf3e77078e2a"
total_cost0.07305
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences7
wordCounts
020
120
220
320
420
520
620