Run: 2026-04-24-01KPZV1Q9Q9SZQPA24B2B9ZAB0

Run Details

Duration:
6.2s
Cost:
$0.010075
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
76.41% 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 against the bay windows of Blackwood Manor, drowning the distant church bells that tolled midnight across the moors. Inspector Harriet Cole stepped carefully over the threshold, her boots leaving wet prints on the polished oak entrance floor. The butler stood trembling beside an overturned candelabra, wax pooling like blood across the Persian rug beneath him. Seven guests huddled silently in the drawing room, their faces pale masks reflecting the dying embers of the stone fireplace. Lord Ashworth lay sprawled across his mahogany desk upstairs, a silver letter opener protruding from between his stiffened shoulder blades. Harriet examined the scene quietly, noting the open window, the scattered papers, and one peculiar detail nobody had mentioned yet. A single white rose rested carefully on the victim's chest, its thorns stripped clean and stem wrapped in black ribbon. She turned slowly toward the doorway where the guests had gathered, studying each trembling face with practiced, unflinching, deliberate attention. Someone inside this house had committed murder tonight, and every person present knew far more than they were currently willing to admit.
created_at"2026-04-24T13:32:12.483Z" 4/24/2026, 1:32:12 PM
model"anthropic/claude-4.7-opus-20260416"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2163
moderation_latency(null)
generation_time6117
tokens_prompt46
tokens_completion295
native_tokens_prompt65
native_tokens_completion390
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"
usage0.010075
router(null)
provider_responses
0
endpoint_id"0fa65117-00d9-4835-808d-9b68041d9ce4"
id"f45eb401-aff4-4bc0-a0db-9cf62069ead9"
is_byokfalse
latency2160
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-1777037532-JmNi0MOhmzZJnXbk1D4f"
session_id(null)
api_type"completions"
id"gen-1777037532-eygkFjDuDTQRmiuGAakm"
upstream_id"f45eb401-aff4-4bc0-a0db-9cf62069ead9"
total_cost0.010075
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
76.41% Matches word count n/a
neededCleanfalse
sentences9
wordCounts
020
119
218
320
420
520
620
720
822