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Run: 2026-07-01-01KWE9FGFMCH0QF7QXEBEC090D
Run Details
Model:
Claude Sonnet 5 (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
13.7s
Cost:
$0.015810
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 against the old mansion's windows late that night. Detective Sarah Miles arrived just after the storm had begun. The old butler stood pale and silent at the door. Something terrible had happened inside, he finally whispered very quietly. Lord Ashford lay dead upon his own study's marble floor. A single candle flickered beside his lifeless, cold, still body. Sarah knelt down slowly, examining the wound with careful precision. This was clearly no accident, she murmured under her breath. The killer, she suspected, was still somewhere in the house. Outside, thunder rolled loudly as the mystery began to unfold.
created_at
"2026-07-01T07:32:15.488Z"
7/1/2026, 7:32:15 AM
model
"anthropic/claude-sonnet-5-20260630"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3593
moderation_latency
(null)
generation_time
13664
tokens_prompt
46
tokens_completion
286
native_tokens_prompt
60
native_tokens_completion
1569
native_tokens_completion_images
(null)
native_tokens_reasoning
129
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
0.01581
router
(null)
provider_responses
0
endpoint_id
"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id
"msg_01KGKwHDpHSn3pfFyhwepVAS"
is_byok
false
latency
1592
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-1782891135-3KHtgoqGKtjCoQHhR65g"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1782891135-BquhviYvvodWJVfeBoOJ"
upstream_id
"msg_01KGKwHDpHSn3pfFyhwepVAS"
total_cost
0.01581
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