Run: 2026-07-01-01KWE9EQ90DAK4FRNPCFDEGWGH

Run Details

Duration:
28.1s
Cost:
$0.036980
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 mansion, soaking the gravel drive and darkening the ancient gray stone walls completely tonight. Detective Elena Marsh stepped out of her car, pulling her old coat tightly against the biting, freezing midnight wind outside. Inside the grand foyer, a lifeless body lay sprawled beneath the flickering light of an old crystal chandelier above him. The victim, a wealthy and respected businessman named Charles Whitfield, wore an expensive suit stained deeply with dark crimson blood. Elena knelt slowly beside him, noting the peculiar angle of his neck and the total absence of any visible weapon. She glanced slowly around the silent room, sensing that this quiet death held far darker secrets beneath its calm surface.
created_at"2026-07-01T07:31:49.677Z" 7/1/2026, 7:31:49 AM
model"anthropic/claude-sonnet-5-20260630"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency5099
moderation_latency(null)
generation_time28003
tokens_prompt46
tokens_completion438
native_tokens_prompt60
native_tokens_completion3686
native_tokens_completion_images(null)
native_tokens_reasoning250
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"
usage0.03698
router(null)
provider_responses
0
endpoint_id"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id"msg_01PnGrHN8sZQc3JL6eatmwwP"
is_byokfalse
latency2703
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-1782891109-QtHjRPvNVmsG4Winp6uW"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1782891109-GkBW1vt5PBbfDNuMuNPl"
upstream_id"msg_01PnGrHN8sZQc3JL6eatmwwP"
total_cost0.03698
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