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Run: 2026-02-24-01KJ8VY6WEWJG2830V80WDNPKA
Run Details
Model:
Claude Opus 4.6 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
24.7s
Cost:
$0.035580
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 old mansion stood silent against the dark stormy night. Detective Sarah Mills stepped out of her car and paused. Rain soaked her coat as she approached the front door. A uniformed officer waited on the porch with grim eyes. He said the body was found in the study upstairs. She nodded once and followed him through the grand hallway. Portraits of wealthy ancestors lined the walls in silent judgment. The smell of old wood and something metallic filled everything. Upstairs, a door hung open, spilling pale light into darkness. She stepped inside and saw what no one should see. Victor Ashworth lay crumpled beside his desk in dark blood. His cold hand still clutched a torn photograph of someone. The window behind him was shattered open to the storm. Sarah knelt down and studied the wound across his throat. This was no accident and it was no simple robbery. Someone in this house had wanted Victor Ashworth permanently silenced.
created_at
"2026-02-24T22:22:26.712Z"
2/24/2026, 10:22:26 PM
model
"anthropic/claude-4.6-opus-20260205"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1428
moderation_latency
115
generation_time
24469
tokens_prompt
46
tokens_completion
788
native_tokens_prompt
61
native_tokens_completion
1411
native_tokens_completion_images
(null)
native_tokens_reasoning
540
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
0.03558
router
(null)
provider_responses
0
endpoint_id
"a8708fb9-08ea-43bb-a3b1-165c87ef09df"
id
"02d3ed40-7a7a-4c5c-8104-691ec8e99d32"
is_byok
false
latency
1290
model_permaslug
"anthropic/claude-4.6-opus-20260205"
provider_name
"Amazon Bedrock"
status
200
api_type
"completions"
id
"gen-1771971746-80tuipjGjte2puG7W0Na"
upstream_id
"02d3ed40-7a7a-4c5c-8104-691ec8e99d32"
total_cost
0.03558
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
16
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