Run: 2026-02-24-01KJ8WAZGP39Q9TC9Q3KNYVVMY

Run Details

Duration:
27.6s
Cost:
$0.074505
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
The body lay crumpled beneath the grand staircase, one pale hand still clutching a small torn piece of dark velvet. Detective Mara Cole stepped through the front door of the Ashworth mansion, brushing rain from her long black leather coat. The grandfather clock in the hallway had stopped at precisely eleven forty-seven, and nobody in the house could explain why. She knelt beside the victim, a wealthy old man named Gerald Ashworth, whose eyes were still wide open with terror. A crystal glass lay shattered on the marble floor nearby, and the sharp scent of bitter almonds filled the air. Seven guests had been invited to dinner that evening, and every single one of them had a reason to kill. Mara stood slowly and surveyed the room, noting the overturned chair, the scattered papers, and the blood on the wall. Someone in this house had committed a terrible act, and the storm outside meant that no one could leave tonight. She pulled her notebook from her pocket and began to write, knowing that the truth was hiding among the living. The dead always spoke to those who listened carefully enough, and Detective Cole was very good at listening to them.
created_at"2026-02-24T22:29:25.152Z" 2/24/2026, 10:29:25 PM
model"anthropic/claude-4.6-opus-20260205"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1460
moderation_latency212
generation_time27276
tokens_prompt46
tokens_completion912
native_tokens_prompt61
native_tokens_completion2968
native_tokens_completion_images(null)
native_tokens_reasoning605
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"
usage0.074505
router(null)
provider_responses
0
endpoint_id"a8708fb9-08ea-43bb-a3b1-165c87ef09df"
id"6adb66f2-79f1-4e27-8da4-9c99ea42b41e"
is_byokfalse
latency1459
model_permaslug"anthropic/claude-4.6-opus-20260205"
provider_name"Amazon Bedrock"
status200
api_type"completions"
id"gen-1771972165-WtnfADLQjKwjhUdljwGY"
upstream_id"6adb66f2-79f1-4e27-8da4-9c99ea42b41e"
total_cost0.074505
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
020
120
220
320
420
520
620
720
820
920