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Run: 2026-02-24-01KJ8V5YH5QCHCBCY9AQ56T7JD
Run Details
Model:
Claude Sonnet 4.6 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
30.5s
Cost:
$0.058008
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 lighthouse stood alone against the dark stormy sky. Detective Marlowe arrived at the cold scene just after midnight. Rain hammered the cobblestones as he stepped from his car. A body lay crumpled beneath the old wrought iron gate. The victim appeared to be a man in his forties. His expensive suit was soaked completely through with the rain. Marlowe bent down slowly and examined the deep wound carefully. Someone had clearly wanted this man dead very badly indeed. No wallet, no phone, and no identification of any kind. Marlowe stood and stared out at the long empty street. Whoever had done this was still somewhere out there tonight.
created_at
"2026-02-24T22:09:11.728Z"
2/24/2026, 10:09:11 PM
model
"anthropic/claude-4.6-sonnet-20260217"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
909
moderation_latency
150
generation_time
30199
tokens_prompt
46
tokens_completion
1065
native_tokens_prompt
61
native_tokens_completion
3855
native_tokens_completion_images
(null)
native_tokens_reasoning
903
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
0.058008
router
(null)
provider_responses
0
endpoint_id
"83d802cb-44f2-45a0-a9d5-cb9bf79777c8"
id
"92b82ac4-a04a-4762-9267-d2a97e158707"
is_byok
false
latency
909
model_permaslug
"anthropic/claude-4.6-sonnet-20260217"
provider_name
"Amazon Bedrock"
status
200
api_type
"completions"
id
"gen-1771970951-PkN6yd6eaqSkDHEEvGrJ"
upstream_id
"92b82ac4-a04a-4762-9267-d2a97e158707"
total_cost
0.058008
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
11
wordCounts
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10
8
10
9
10
10
10