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Run: 2026-07-01-01KWE9J6V57B3QAW8ZYGQW4ZXQ
Run Details
Model:
Claude Sonnet 5
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
5.8s
Cost:
$0.002620
Provider:
Amazon Bedrock
Evaluation summary
Score
Evaluator
Details Link
63.40%
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 Last Guest Rain hammered the old mansion's windows like frantic fingers tapping. Detective Sarah Voss stepped inside, shaking water from her coat. The butler stood frozen, his face pale as ash. "Mr. Whitmore is dead," he whispered, voice trembling badly. Sarah nodded, already scanning the grand foyer's shadows. Twelve guests had arrived for dinner that stormy night. Now only eleven remained breathing within these cold walls. She climbed the marble staircase, her senses sharp and alert. The study door stood open, revealing a gruesome scene. Blood pooled beneath a body slumped across mahogany. Sarah exhaled slowly, murmuring, "Let the questions begin."
created_at
"2026-07-01T07:33:43.918Z"
7/1/2026, 7:33:43 AM
model
"anthropic/claude-sonnet-5-20260630"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1982
moderation_latency
(null)
generation_time
5754
tokens_prompt
46
tokens_completion
168
native_tokens_prompt
60
native_tokens_completion
250
native_tokens_completion_images
(null)
native_tokens_reasoning
0
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
0.00262
router
(null)
provider_responses
0
endpoint_id
"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id
"msg_01NdKsAD5QbxPT3UBGywwoCN"
is_byok
false
latency
1982
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-1782891223-UyFwmjpGoXWkQkt6QU8Z"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1782891223-ElM648rHfv1oNzvaAHtj"
upstream_id
"msg_01NdKsAD5QbxPT3UBGywwoCN"
total_cost
0.00262
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
63.40%
Matches word count
n/a
neededClean
false
sentences
12
wordCounts
0
4
1
10
2
10
3
9
4
9
5
8
6
9
7
9
8
10
9
9
10
8
11
8