Run: 2026-07-01-01KWE8W75YGCYKA5ZG45W70GQM

Run Details

Duration:
30.5s
Cost:
$0.040170
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 pounded hard against the mansion's tall windows as Detective Sarah Chen quietly entered the dim, silent, empty hallway tonight. A woman's lifeless body lay sprawled motionless across the cold, polished marble floor near the grand, curving staircase below tonight. Chen knelt slowly beside the corpse, carefully noticing a single, crimson rose clutched tightly within her pale, cold hand there. The victim, identified quickly as wealthy socialite Margaret Ashford, had apparently been dead for several long, agonizing hours already tonight. Chen suspected instinctively that this brutal murder was only the beginning of something far darker, more sinister, and yet unknown.
created_at"2026-07-01T07:21:43.367Z" 7/1/2026, 7:21:43 AM
model"anthropic/claude-sonnet-5-20260630"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4665
moderation_latency(null)
generation_time30512
tokens_prompt46
tokens_completion661
native_tokens_prompt60
native_tokens_completion4005
native_tokens_completion_images(null)
native_tokens_reasoning491
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"
usage0.04017
router(null)
provider_responses
0
endpoint_id"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id"msg_01P3D7y85Hwm6AgxVYYjg3Dd"
is_byokfalse
latency2207
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-1782890503-maLvmNpKykcJSn5GO77E"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1782890503-cu65uoi7TryQVY8LqmBk"
upstream_id"msg_01P3D7y85Hwm6AgxVYYjg3Dd"
total_cost0.04017
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