Run: 2026-02-24-01KJ8WHXXWWGSAWV3N1YPGDXG4

Run Details

Duration:
39.1s
Cost:
$0.077680
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 at the foot of the grand staircase, a single red rose clutched in her left hand. Detective Maria Vasquez ducked beneath the yellow crime scene tape and studied the body with her sharp, quiet, unforgiving eyes. The mansion had hosted a lavish party the night before, and now its marble halls echoed only with grieving silence. No one had heard a scream, or so they claimed, yet the walls of this old house were remarkably thin. The victim was Eleanor Ashworth, the sole heiress to a shipping fortune and beloved wife of the man weeping downstairs. Her silk gown was torn at the shoulder, and a bruise darkened her throat like the shadow of something terrible. Vasquez knelt beside the body and noticed that Eleanor's emerald necklace was missing, though its clasp still marked her skin. Someone at that party had wanted Eleanor dead, and Vasquez intended to find out which of them had done it. She stood, brushed off her coat, and turned to face the twelve shaken guests waiting in the dim drawing room. Each of them had motive, and before this long night was over, she would make certain the truth came out.
created_at"2026-02-24T22:33:12.899Z" 2/24/2026, 10:33:12 PM
model"anthropic/claude-4.6-opus-20260205"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1534
moderation_latency174
generation_time38807
tokens_prompt46
tokens_completion781
native_tokens_prompt61
native_tokens_completion3095
native_tokens_completion_images(null)
native_tokens_reasoning481
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"
usage0.07768
router(null)
provider_responses
0
endpoint_id"a8708fb9-08ea-43bb-a3b1-165c87ef09df"
id"b5308f0a-3aa9-4aad-9395-b3a92747a0cb"
is_byokfalse
latency1387
model_permaslug"anthropic/claude-4.6-opus-20260205"
provider_name"Amazon Bedrock"
status200
api_type"completions"
id"gen-1771972392-jk02cpoDD71dGUxzNp9f"
upstream_id"b5308f0a-3aa9-4aad-9395-b3a92747a0cb"
total_cost0.07768
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