Run: 2026-07-01-01KWE9AAKSVB65XTD6WJKR2Z3C

Run Details

Duration:
27.7s
Cost:
$0.038850
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
Rain fell steadily over the old manor, tapping softly against tall, dark windows like impatient, nervous fingers seeking quiet entry. Detective Mara Voss stood silently beneath the entrance, staring up at the crumbling, ancient stone facade above her tired head. Behind her, two uniformed officers waited quietly outside, their flashlights cutting narrow beams through the steadily falling cold night rain. Inside, someone had already discovered the body, and the entire old house had suddenly gone terribly, unnervingly silent again tonight. Mara slowly adjusted her damp coat, took one slow, steadying breath, and finally stepped through the heavy old oak door.
created_at"2026-07-01T07:29:25.637Z" 7/1/2026, 7:29:25 AM
model"anthropic/claude-sonnet-5-20260630"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3896
moderation_latency(null)
generation_time27627
tokens_prompt46
tokens_completion417
native_tokens_prompt60
native_tokens_completion3873
native_tokens_completion_images(null)
native_tokens_reasoning251
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"
usage0.03885
router(null)
provider_responses
0
endpoint_id"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id"msg_01X8j5c1N4AHBcqqocybpaXs"
is_byokfalse
latency1871
model_permaslug"anthropic/claude-sonnet-5-20260630"
provider_name"Amazon Bedrock"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.17.0; linux; x64))"
http_referer(null)
request_id"req-1782890965-LzxQTFaIttfnYrUuawEC"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1782890965-3upYUB9IPWC62Q52khjD"
upstream_id"msg_01X8j5c1N4AHBcqqocybpaXs"
total_cost0.03885
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
100.00% Matches word count n/a
neededCleanfalse
sentences5
wordCounts
020
120
220
320
420