Run: 2026-07-01-01KWE8WSV3HVZ2YNJ2FWZVZ4D7

Run Details

Duration:
6.0s
Cost:
$0.003040
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
63.96% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 10 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
# The Last Guest Rain hammered the old mansion's windows without any mercy. Detective Sarah Chen arrived just after midnight that night. The butler waited nervously at the towering front door. "Something terrible has happened," he whispered, his hands trembling. Sarah nodded and stepped inside, removing her wet coat. The grand foyer smelled faintly of gunpowder and roses. Seven guests sat silently in the adjacent dark parlor. Each one avoided eye contact, staring at the floor. The host lay dead beside his antique mahogany desk. A single bullet wound marked his otherwise pristine forehead. Sarah scanned the room, noting every small detail carefully. Nobody had heard the gunshot during the storm. The killer, she realized, was still in this house. She pulled out her notebook and cleared her throat. "No one leaves until I solve this murder."
created_at"2026-07-01T07:22:02.481Z" 7/1/2026, 7:22:02 AM
model"anthropic/claude-sonnet-5-20260630"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1522
moderation_latency(null)
generation_time5958
tokens_prompt46
tokens_completion214
native_tokens_prompt60
native_tokens_completion292
native_tokens_completion_images(null)
native_tokens_reasoning0
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"
usage0.00304
router(null)
provider_responses
0
endpoint_id"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id"msg_017mjovn491VurbZh8oXe7vA"
is_byokfalse
latency1522
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-1782890522-Kr4lgKNgZMsEzdPIg1Gx"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1782890522-Jm3ibVXJL7Q0RGlCGUIb"
upstream_id"msg_017mjovn491VurbZh8oXe7vA"
total_cost0.00304
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
63.96% Matches word count n/a
neededCleanfalse
sentences16
wordCounts
04
19
29
39
49
59
69
79
89
99
109
119
128
139
149
158