Run: 2026-04-24-01KQ0GB7K73W9XBPDXVCPYSJAV

Run Details

Duration:
12.7s
Cost:
$0.051950
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 heavy sheets across the cobblestones of Ashford Lane, drumming steadily against the windows of number forty-two. Detective Miriam Hollis arrived at the crime scene just past midnight, her coat soaked and her patience already running thin. Inside the parlor, a well-dressed man lay crumpled beside the hearth, a silver letter opener buried deep in his chest. The housekeeper stood trembling near the doorway, clutching a porcelain teacup whose contents had spilled across the polished wooden floor. Miriam knelt beside the body, noting the faint scent of almonds mingling with something sharper, something deeply and unmistakably wrong. She glanced up slowly at the housekeeper and asked, in a voice quieter than the storm, who had visited tonight. The old woman's lips parted, but before she could speak, every lamp in the house flickered and abruptly went out.
created_at"2026-04-24T19:44:24.17Z" 4/24/2026, 7:44:24 PM
model"anthropic/claude-4.7-opus-20260416"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2295
moderation_latency(null)
generation_time12645
tokens_prompt46
tokens_completion390
native_tokens_prompt65
native_tokens_completion2065
native_tokens_completion_images(null)
native_tokens_reasoning170
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"
usage0.05195
router(null)
provider_responses
0
endpoint_id"0fa65117-00d9-4835-808d-9b68041d9ce4"
id"49455e1d-39e3-4e1c-92e9-ee02b45042ec"
is_byokfalse
latency882
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-1777059864-9v7hIpllog2emUrIv8QH"
session_id(null)
api_type"completions"
id"gen-1777059864-NkVJqeucAr8dUoFnTYwD"
upstream_id"49455e1d-39e3-4e1c-92e9-ee02b45042ec"
total_cost0.05195
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