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Run: 2026-02-24-01KJ8WPEAMKMJWHSCJK5R8SMET
Run Details
Model:
Claude Sonnet 4.6 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
39.0s
Cost:
$0.051363
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 clock tower struck midnight over quiet Harlow village. Cold rain fell in heavy sheets against the dark windows. Nobody in the sleeping village had noticed the body yet. It lay crumpled near the garden gate of Ashford Manor. Detective Clara Voss received the call at half past twelve. She pulled her coat tight and stepped into the rain. The victim was a man no one seemed to know. He wore a fine dark suit that cost serious money. Clara knelt down and studied the wound on his neck. This was certainly no accident, and she already knew it. Someone in Harlow village had committed a very cold murder. And that someone was standing very close, watching her work.
created_at
"2026-02-24T22:35:40.764Z"
2/24/2026, 10:35:40 PM
model
"anthropic/claude-4.6-sonnet-20260217"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
871
moderation_latency
111
generation_time
38809
tokens_prompt
46
tokens_completion
698
native_tokens_prompt
61
native_tokens_completion
3412
native_tokens_completion_images
(null)
native_tokens_reasoning
522
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
0.051363
router
(null)
provider_responses
0
endpoint_id
"83d802cb-44f2-45a0-a9d5-cb9bf79777c8"
id
"9b924596-2f40-4e9f-920c-f2e47f519390"
is_byok
false
latency
729
model_permaslug
"anthropic/claude-4.6-sonnet-20260217"
provider_name
"Amazon Bedrock"
status
200
api_type
"completions"
id
"gen-1771972540-yz4AcxjNbs8yEZIlCx56"
upstream_id
"9b924596-2f40-4e9f-920c-f2e47f519390"
total_cost
0.051363
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
12
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