Run: 2026-07-01-01KWE9CR6VVQK8ZADHHCYM8XAX

Run Details

Duration:
35.8s
Cost:
$0.046200
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 old mansion stood silent beneath a sky heavy with storm clouds, its windows dark, hiding many unspoken secrets tonight. Detective Sarah Chen arrived just after midnight, her coat soaked through from the relentless downpour outside the old iron gates. A uniformed officer met her at the entrance, his face pale and clearly shaken by what he'd just seen inside. Inside, the body of Lord Ashford lay sprawled across the cold marble floor, blood pooling silently beneath his motionless head. Sarah knelt beside him, noting a strange, dark bruise marking his pale neck, immediately catching her very trained, watchful eye. She glanced slowly around the grand, silent room, sensing this case would prove far more complicated than she'd ever expected.
created_at"2026-07-01T07:30:45.096Z" 7/1/2026, 7:30:45 AM
model"anthropic/claude-sonnet-5-20260630"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3899
moderation_latency(null)
generation_time35782
tokens_prompt46
tokens_completion595
native_tokens_prompt60
native_tokens_completion4608
native_tokens_completion_images(null)
native_tokens_reasoning408
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"
usage0.0462
router(null)
provider_responses
0
endpoint_id"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id"msg_01GQQXoCy9E7jqRNBsaaXXxo"
is_byokfalse
latency1763
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-1782891045-86zTOXOQFCum18MKzJwV"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1782891045-SU7qE325clhUinWx4XCM"
upstream_id"msg_01GQQXoCy9E7jqRNBsaaXXxo"
total_cost0.0462
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
sentences6
wordCounts
020
120
220
320
420
520