Run: 2026-04-24-01KQ0GGBVRCY0EKSK6TVDJ7YYX

Run Details

Duration:
11.9s
Cost:
$0.050900
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 had been falling steadily on Blackwood Manor for three consecutive days, drowning the gardens in restless silver pools. Inspector Margaret Hollis arrived at precisely seven o'clock, her wet coat dripping onto marble floors polished by generations of servants. The elderly butler, pale and trembling, led her up the grand staircase toward the library where Lord Ashcombe lay dead. Firelight flickered softly across the victim's stunned expression, illuminating a silver letter opener embedded deep within his starched evening shirt. Five guests waited downstairs in an uneasy silence, each one nursing secrets older than the ancient oaks surrounding the estate. Margaret studied the cooling body carefully, knowing that someone present tonight had smiled warmly before calmly driving that blade home.
created_at"2026-04-24T19:47:12.379Z" 4/24/2026, 7:47:12 PM
model"anthropic/claude-4.7-opus-20260416"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2343
moderation_latency(null)
generation_time11858
tokens_prompt46
tokens_completion381
native_tokens_prompt65
native_tokens_completion2023
native_tokens_completion_images(null)
native_tokens_reasoning179
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"
usage0.0509
router(null)
provider_responses
0
endpoint_id"0fa65117-00d9-4835-808d-9b68041d9ce4"
id"5a519724-590e-4f8f-bfbf-9a77cf5cc085"
is_byokfalse
latency691
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-1777060032-3VTGDl0RbmYK8ZAnQvQu"
session_id(null)
api_type"completions"
id"gen-1777060032-bDiOHPAb3VNE2GOPSwEw"
upstream_id"5a519724-590e-4f8f-bfbf-9a77cf5cc085"
total_cost0.0509
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
sentences6
wordCounts
020
120
220
320
420
520