Run: 2026-07-01-01KWE91KNDJ9YTNX7FMCFY2VX9

Run Details

Duration:
35.4s
Cost:
$0.048950
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 stone manor, drumming softly against tall dark windows like cold fingers tapping for entry. Detective Mara Voss stood quietly beneath the dripping eaves, staring intently up at the dimly lit old study window above. Inside, Lord Ashworth lay motionless across his mahogany desk, a silver letter opener protruding deep from his cold, still chest. His eyes remained wide open, fixed permanently on the ceiling as if startled badly by something entirely unseen nearby, waiting. Voss knelt slowly beside the body, carefully noting the absence of struggle or disturbed furniture in the quiet, dim room. Whoever had done this terrible thing, she thought grimly, had known this old house intimately, and had left no trace. Somewhere within this rain-soaked old manor, the killer was surely watching closely, waiting to see what she would discover next.
created_at"2026-07-01T07:24:39.995Z" 7/1/2026, 7:24:39 AM
model"anthropic/claude-sonnet-5-20260630"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4304
moderation_latency(null)
generation_time35295
tokens_prompt46
tokens_completion481
native_tokens_prompt60
native_tokens_completion4883
native_tokens_completion_images(null)
native_tokens_reasoning262
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"
usage0.04895
router(null)
provider_responses
0
endpoint_id"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id"msg_01JdyojboonoHeZY9rR9ukoM"
is_byokfalse
latency2347
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-1782890680-UUsfCCkN4jOINMsocHx7"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1782890680-9c6BeUf8MJUBA7Ym2bi3"
upstream_id"msg_01JdyojboonoHeZY9rR9ukoM"
total_cost0.04895
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
sentences7
wordCounts
020
120
220
320
420
520
620