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Run: 2026-07-01-01KWE8RSEAVBNVT3NXDCM5DY7H
Run Details
Model:
Claude Sonnet 5 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
13.0s
Cost:
$0.014520
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 hammered the old mansion's windows under a black sky. Detective Sarah Mills stepped inside, shaking water from her coat. The butler stood silently, his face pale and drawn tight. Behind him, a body lay sprawled across the marble floor. Blood pooled slowly, spreading dark across the polished white stone. Nobody moved, waiting for someone to finally speak the truth. Sarah knelt beside the victim, examining the fatal wound closely. A single silver knife glinted beneath the chandelier's dim light. Someone in this house knew exactly what had truly happened. Sarah stood, determined to uncover every hidden secret this night.
created_at
"2026-07-01T07:19:50.999Z"
7/1/2026, 7:19:50 AM
model
"anthropic/claude-sonnet-5-20260630"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3476
moderation_latency
(null)
generation_time
12943
tokens_prompt
46
tokens_completion
278
native_tokens_prompt
60
native_tokens_completion
1440
native_tokens_completion_images
(null)
native_tokens_reasoning
120
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
0.01452
router
(null)
provider_responses
0
endpoint_id
"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id
"msg_01RwevCDgpPejuBSSNWFHFFy"
is_byok
false
latency
1544
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-1782890391-9wgyZ6nmajude1YmCWxl"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1782890391-XNiCnpIKskTiKw8aR5vf"
upstream_id
"msg_01RwevCDgpPejuBSSNWFHFFy"
total_cost
0.01452
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