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Run: 2026-02-24-01KJ8WMZBCQDZJ7CH5NQC6KN2C
Run Details
Model:
Claude Sonnet 4.6 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
47.7s
Cost:
$0.063858
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 Blackwood Manor was silent on that dark evening. Rain hammered the tall windows like a thousand tiny fists. Inside, the guests had gathered for the annual dinner party. Then someone opened the library door and began to scream. Lord Ashworth lay dead across his grand mahogany writing desk. A thin ivory letter knife was buried in his back. Detective Clara Marsh arrived within the hour, soaking and grim. She surveyed the room with her sharp, calculating gray eyes. Everyone in the manor had a reason to hate him. Only one of them, however, had finally acted upon it.
created_at
"2026-02-24T22:34:52.66Z"
2/24/2026, 10:34:52 PM
model
"anthropic/claude-4.6-sonnet-20260217"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
680
moderation_latency
153
generation_time
47534
tokens_prompt
46
tokens_completion
470
native_tokens_prompt
61
native_tokens_completion
4245
native_tokens_completion_images
(null)
native_tokens_reasoning
326
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
0.063858
router
(null)
provider_responses
0
endpoint_id
"83d802cb-44f2-45a0-a9d5-cb9bf79777c8"
id
"30b082b2-94bb-45d5-b5a7-e9961a01c310"
is_byok
false
latency
679
model_permaslug
"anthropic/claude-4.6-sonnet-20260217"
provider_name
"Amazon Bedrock"
status
200
api_type
"completions"
id
"gen-1771972492-T9erj89iS7rVsOrILMtu"
upstream_id
"30b082b2-94bb-45d5-b5a7-e9961a01c310"
total_cost
0.063858
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
10
wordCounts
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10
8
10
9
10