Run: 2026-04-24-01KPZTWJAQ413P9Z2VNGX0P8Q2

Run Details

Duration:
5.4s
Cost:
$0.010275
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
82.51% 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 tall Victorian windows of Thornfield Manor as Detective Sarah Chen stepped through the grand oak doorway. The butler, pale and trembling, gestured silently toward the library where something terrible had clearly taken place that evening. Seven guests huddled together in the adjacent drawing room, their faces drawn tight with fear and barely concealed suspicion. Lord Ashworth lay sprawled across the Persian rug, a silver letter opener buried deep within his broad, still chest. Candles flickered wildly on the mantelpiece, casting dancing shadows that seemed to mock the gruesome scene unfolding before her experienced eyes. Sarah knelt carefully beside the body, noting the absence of blood pooling beneath the expensive black dinner jacket he wore. Someone had moved him here, she realized immediately, her sharp gaze sweeping across the room for telltale signs of disturbance. A single muddy footprint marked the polished floor near the window, which stood slightly ajar despite the howling storm outside. Behind her, the grandfather clock struck midnight with twelve deep, resonant tones that echoed hauntingly through the silent, watchful house.
created_at"2026-04-24T13:29:23.556Z" 4/24/2026, 1:29:23 PM
model"anthropic/claude-4.7-opus-20260416"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency864
moderation_latency(null)
generation_time5279
tokens_prompt46
tokens_completion295
native_tokens_prompt65
native_tokens_completion398
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"
usage0.010275
router(null)
provider_responses
0
endpoint_id"0fa65117-00d9-4835-808d-9b68041d9ce4"
id"c84f62be-3bc2-4f77-9806-8d8a3b20c587"
is_byokfalse
latency864
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-1777037363-0ILfb9SIhHczaqNL8fgU"
session_id(null)
api_type"completions"
id"gen-1777037363-nsZaCmIgiZb2ny387KhO"
upstream_id"c84f62be-3bc2-4f77-9806-8d8a3b20c587"
total_cost0.010275
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
82.51% Matches word count n/a
neededCleanfalse
sentences9
wordCounts
020
119
219
319
421
520
620
720
820