Run: 2026-07-25-01KYCRCVWE2DET7ASSS7CR12H3

Run Details

Duration:
24.3s
Cost:
$0.056850
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
95.63% 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 on Ashgrove Manor since midnight, and by dawn the gravel drive resembled a shallow river. Miss Edith Prine noticed the library door standing open, which had never once happened in eleven years of faithful service. She carried the breakfast tray inside, expecting to find the colonel asleep in his chair beside the cold grey fireplace. Instead she found him face down upon the Persian carpet, one hand outstretched toward the telephone he had never reached. The tray struck the floor and the teapot shattered, spraying hot brown Darjeeling across the dead man's polished riding boots. Nobody in the house heard her scream, because the storm had swallowed every sound the old stone walls could produce. By seven o'clock, when the cook finally came looking, the fire had died and rain streaked the tall east windows. Edith sat on the bottom stair, hands folded, whispering over and over that she had locked that door herself. Sergeant Bell arrived at nine, soaked through, and asked which of the eleven guests had most wanted Colonel Fairbourne dead.
created_at"2026-07-25T13:45:52.278Z" 7/25/2026, 1:45:52 PM
model"anthropic/claude-opus-5-20260723"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4559
moderation_latency(null)
generation_time24184
tokens_prompt46
tokens_completion636
native_tokens_prompt60
native_tokens_completion2262
native_tokens_completion_images(null)
native_tokens_reasoning367
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"
service_tier"default"
usage0.05685
router(null)
provider_responses
0
endpoint_id"76cb4608-f48c-483d-8da8-9957fb44244e"
id"msg_011CdNsrbKCPQeB9EwkfiByn"
is_byokfalse
latency1612
model_permaslug"anthropic/claude-opus-5-20260723"
provider_name"Amazon Bedrock"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.18.0; linux; x64))"
http_referer(null)
request_id"req-1784987152-Y1WXtzxDVgGbskyJGTLD"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1784987152-ACzMkMb1ZQg6mrAHloFs"
upstream_id"msg_011CdNsrbKCPQeB9EwkfiByn"
total_cost0.05685
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"
response_cache_source_id(null)
data_region"global"

Evaluation details

Result Evaluator Details Meta Data
95.63% Matches word count n/a
neededCleanfalse
sentences9
wordCounts
020
120
220
320
420
520
620
719
820