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Run: 2026-02-24-01KJ8W75TNN671AZVX6W0TNR26
Run Details
Model:
Claude Opus 4.6 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
31.9s
Cost:
$0.067280
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 10 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
The body lay crumpled beneath the old oak tree outside. Detective Harris knelt down and studied the victim's pale face. Rain had washed away most of the evidence by dawn. A single red rose rested gently on the woman's chest. No one in this quiet town expected something so terrible. The call had come in just after three this morning. Harris recognized the woman but chose not to say anything. Her name was Margaret Cole, the mayor's wife, no less. This case would tear the entire community apart, he knew. He pulled on latex gloves and examined her cold hands. Bruises circled her wrists like dark ribbons tied too tightly. She had fought hard against whoever did this to her. A young officer approached, holding a coffee and looking shaken. The neighbors reported hearing loud screams just after two thirty. Harris nodded slowly and turned his gaze back toward Margaret. Someone in this town was hiding a very dark secret. He would find them, no matter what the cost became.
created_at
"2026-02-24T22:27:20.542Z"
2/24/2026, 10:27:20 PM
model
"anthropic/claude-4.6-opus-20260205"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1385
moderation_latency
425
generation_time
31443
tokens_prompt
46
tokens_completion
1147
native_tokens_prompt
61
native_tokens_completion
2679
native_tokens_completion_images
(null)
native_tokens_reasoning
889
native_tokens_cached
0
num_media_prompt
(null)
num_input_audio_prompt
(null)
num_media_completion
0
num_search_results
(null)
origin
"https://ncbench.com/"
is_byok
false
finish_reason
"stop"
native_finish_reason
"stop"
usage
0.06728
router
(null)
provider_responses
0
endpoint_id
"a8708fb9-08ea-43bb-a3b1-165c87ef09df"
id
"af883f4a-0f19-4084-a32e-b11062d45062"
is_byok
false
latency
1293
model_permaslug
"anthropic/claude-4.6-opus-20260205"
provider_name
"Amazon Bedrock"
status
200
api_type
"completions"
id
"gen-1771972040-0U0MqjtFMsBe5EZL5HrL"
upstream_id
"af883f4a-0f19-4084-a32e-b11062d45062"
total_cost
0.06728
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Amazon Bedrock"
Evaluation details
Result
Evaluator
Details
Meta Data
100.00%
Matches word count
n/a
neededClean
false
sentences
17
wordCounts
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10
8
10
9
10
10
10
11
10
12
10
13
10
14
10
15
10
16
10