Run: 2026-02-24-01KJ8X0EYATJWP4333KDGB9XEJ

Run Details

Duration:
34.1s
Cost:
$0.074330
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, still wearing the evening gown from last night's party. Detective Maria Santos ducked beneath the yellow tape and studied the scene with her sharp, practiced, and ever-observant dark eyes. The victim was Eleanor Ashworth, heiress to a vast fortune and host of the infamous charity gala held each December. No one had heard her fall, though dozens of guests had been sleeping in the mansion's many lavish guest rooms. A single crimson rose rested on the bottom step beside her outstretched hand, its petals still fresh and impossibly bright. Santos knelt down and noticed the faint bruising around Eleanor's neck, which the carefully draped silk scarf had nearly concealed. This was no accident, she whispered to her partner, who stood pale and trembling just beyond the marble foyer entrance. Somewhere above them, behind one of fourteen closed doors, a killer was waiting and pretending to sleep through the morning. The grandfather clock in the hallway struck seven, its deep chime echoing through the silent house like a mournful confession. Santos pulled on her gloves and began the grim work of unraveling the last terrible hours of Eleanor Ashworth's life.
created_at"2026-02-24T22:41:09.074Z" 2/24/2026, 10:41:09 PM
model"anthropic/claude-4.6-opus-20260205"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2225
moderation_latency155
generation_time33835
tokens_prompt46
tokens_completion667
native_tokens_prompt61
native_tokens_completion2961
native_tokens_completion_images(null)
native_tokens_reasoning360
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"
usage0.07433
router(null)
provider_responses
0
endpoint_id"a8708fb9-08ea-43bb-a3b1-165c87ef09df"
id"b2c76022-30eb-48a3-9b9c-cfb1bae4e71c"
is_byokfalse
latency2225
model_permaslug"anthropic/claude-4.6-opus-20260205"
provider_name"Amazon Bedrock"
status200
api_type"completions"
id"gen-1771972869-66c6us6KPwcNftLB65Bd"
upstream_id"b2c76022-30eb-48a3-9b9c-cfb1bae4e71c"
total_cost0.07433
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