Run: 2026-07-01-01KWE9AZEBR6PCN7Z5FTD2KKZN

Run Details

Duration:
40.3s
Cost:
$0.056360
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 hammered against the old mansion's tall windows as Detective Sarah Cole quietly stepped through the creaking wooden front door. The lifeless body lay motionless upon the cold polished marble floor, surrounded by shattered glass and scattered torn papers everywhere. Detective Cole immediately recognized the victim as wealthy local businessman Charles Whitmore, the owner of this grand sprawling countryside estate. A single, precise gunshot wound had marked his pale forehead, though no weapon could be found anywhere in the room. Cole immediately noticed that the antique grandfather clock upon the marble mantel had suddenly stopped precisely at exactly midnight tonight. Somewhere within this grand old country house, she instinctively knew, the very cunning killer was still watching and waiting patiently.
created_at"2026-07-01T07:29:47.168Z" 7/1/2026, 7:29:47 AM
model"anthropic/claude-sonnet-5-20260630"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3872
moderation_latency(null)
generation_time40050
tokens_prompt46
tokens_completion648
native_tokens_prompt60
native_tokens_completion5624
native_tokens_completion_images(null)
native_tokens_reasoning444
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"
usage0.05636
router(null)
provider_responses
0
endpoint_id"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id"msg_013McMa1Veg4gz2CmdhiV8Xb"
is_byokfalse
latency1712
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-1782890987-tHgU8EP34KYhJkCyY1bF"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1782890987-a76BBpL0EEqWkgVOYBGn"
upstream_id"msg_013McMa1Veg4gz2CmdhiV8Xb"
total_cost0.05636
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