Run: 2026-02-18-01KHQ9180QG2KEAESA61G6224W

Run Details

Duration:
6.4s
Cost:
$0.003417
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
0.25% 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
The old lighthouse had stood at the edge of Dunmore Cliff for nearly two hundred forgotten years. Nobody in the village had ever expected to find a body washed up on its steps. Detective Iris Calloway arrived at the scene just as the morning fog began swallowing the shore. She pulled her coat tighter and studied the pale figure lying motionless against the barnacled stone. The victim was a man, perhaps fifty, dressed in an expensive suit completely wrong for weather. Sergeant Potts handed her a small evidence bag containing a single gold button and a key. Iris knelt beside the body and noticed three deep scratches carved carefully into the stone nearby. They formed the shape of a compass, pointing inland toward the shuttered Aldridge estate on hill. No wallet, no identification, no phone — just a faint smell of cedar and something like ash. A local fisherman stood nervously nearby, insisting he had heard no screaming throughout the entire dark night.
created_at"2026-02-18T02:25:04.753267+00:00" 2/18/2026, 2:25:04 AM
model"anthropic/claude-4.6-sonnet-20260217"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1111
moderation_latency202
generation_time6113
tokens_prompt46
tokens_completion249
native_tokens_prompt44
native_tokens_completion219
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)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"stop"
usage0.003417
router(null)
provider_responses
0
id"3b6e4ba0-0dce-4de6-a16f-a9eb3c419520"
status200
is_byokfalse
latency1110
endpoint_id"83d802cb-44f2-45a0-a9d5-cb9bf79777c8"
provider_name"Amazon Bedrock"
model_permaslug"anthropic/claude-4.6-sonnet-20260217"
api_type"completions"
id"gen-1771381497-9IBxZCXGLNzdxDqBKasl"
upstream_id"3b6e4ba0-0dce-4de6-a16f-a9eb3c419520"
total_cost0.003417
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"

Evaluation details

Result Evaluator Details Meta Data
0.25% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
017
116
216
316
416
516
616
716
816
917