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Run: 2026-02-24-01KJ8VQ06ZM737GCCKBBWVAF04
Run Details
Model:
Claude Opus 4.6 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
31.3s
Cost:
$0.076555
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 Morgan arrived at the scene just after midnight struck. Rain had washed away most of the evidence by then. A single red scarf was wrapped tightly around her neck. No one had reported the young woman as missing yet. Her eyes stared upward at nothing, frozen wide with terror. Morgan knelt down and studied the bruises on her wrists. This was no robbery and no random act of violence. Someone had taken great care arranging the body like this. Her hands were folded neatly across her chest, almost peaceful. A folded note protruded from the pocket of her coat. Morgan pulled on gloves before carefully retrieving the damp paper. Three words were scrawled in ink that had barely smudged. The message was simple and cold: she deserved this fate. Morgan stood slowly and scanned the dark tree line ahead. Somewhere out there, a killer was watching and feeling proud.
created_at
"2026-02-24T22:18:30.503Z"
2/24/2026, 10:18:30 PM
model
"anthropic/claude-4.6-opus-20260205"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1634
moderation_latency
252
generation_time
30992
tokens_prompt
46
tokens_completion
1006
native_tokens_prompt
61
native_tokens_completion
3050
native_tokens_completion_images
(null)
native_tokens_reasoning
772
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
0.076555
router
(null)
provider_responses
0
endpoint_id
"a8708fb9-08ea-43bb-a3b1-165c87ef09df"
id
"e68b33c3-fabf-4341-912c-c897ef8d5ab8"
is_byok
false
latency
1543
model_permaslug
"anthropic/claude-4.6-opus-20260205"
provider_name
"Amazon Bedrock"
status
200
api_type
"completions"
id
"gen-1771971510-qCsIQzhEulwaw9qfQ65A"
upstream_id
"e68b33c3-fabf-4341-912c-c897ef8d5ab8"
total_cost
0.076555
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