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Run: 2026-07-01-01KWEA9GYD0QG3PKD6CRX3XJXG
Run Details
Model:
Claude Sonnet 5 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
14.6s
Cost:
$0.016670
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
Rain fell steadily over the quiet, dying seaside town tonight. Detective Mara Voss stepped carefully across the wet, dark cobblestones. A body lay sprawled beneath the old, flickering harbor light. Blood pooled slowly into the cracks between the worn stones. No one had heard a single scream that stormy night. Mara knelt down, examining the victim's pale, cold, dead face. His eyes stared blankly toward the churning, dark, endless sea. Something metallic glinted beside his outstretched, lifeless right hand there. Mara's pulse quickened; this was clearly no simple accident tonight. She whispered softly, "This vicious murder will not go unpunished."
created_at
"2026-07-01T07:46:27.929Z"
7/1/2026, 7:46:27 AM
model
"anthropic/claude-sonnet-5-20260630"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3683
moderation_latency
(null)
generation_time
14540
tokens_prompt
46
tokens_completion
282
native_tokens_prompt
60
native_tokens_completion
1655
native_tokens_completion_images
(null)
native_tokens_reasoning
118
native_tokens_cached
0
num_media_prompt
(null)
num_input_audio_prompt
(null)
num_media_completion
0
num_search_results
(null)
num_fetches
(null)
web_search_engine
(null)
origin
"https://ncbench.com/"
is_byok
false
finish_reason
"stop"
native_finish_reason
"end_turn"
service_tier
"default"
usage
0.01667
router
(null)
provider_responses
0
endpoint_id
"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id
"msg_01KkBy6a9E79pdyTpc9r6rZp"
is_byok
false
latency
1569
model_permaslug
"anthropic/claude-sonnet-5-20260630"
provider_name
"Amazon Bedrock"
status
200
user_agent
"langchainjs-openai/1.0.0 ((node/v24.17.0; linux; x64))"
http_referer
(null)
request_id
"req-1782891987-U6c2vjONUjhCSVJKaB4A"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1782891987-Rrf2Bug2sPRVceU9Mbfv"
upstream_id
"msg_01KkBy6a9E79pdyTpc9r6rZp"
total_cost
0.01667
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Amazon Bedrock"
response_cache_source_id
(null)
data_region
"global"
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