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Run: 2026-07-01-01KWE9TR8XS5DSGV6JEVQ6JK3A
Run Details
Model:
Claude Sonnet 5 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
15.3s
Cost:
$0.018190
Provider:
Amazon Bedrock
Evaluation summary
Score
Evaluator
Details Link
97.12%
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, quiet streets of Millbrook town. Detective Sarah Cole stood quietly beneath the flickering streetlamp outside. A body lay motionless upon the cold, wet pavement below. Blood pooled slowly beneath the victim's pale, lifeless right hand. Sarah knelt down, examining the entire scene with practiced care. No wallet, no phone, only a torn old photograph remained. She turned it over, noticing a strange name written faintly. Somewhere close by, a lone church bell tolled midnight ominously. Sarah whispered, "This is only just the terrible beginning, unfortunately."
created_at
"2026-07-01T07:38:23.915Z"
7/1/2026, 7:38:23 AM
model
"anthropic/claude-sonnet-5-20260630"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3889
moderation_latency
(null)
generation_time
15240
tokens_prompt
46
tokens_completion
346
native_tokens_prompt
60
native_tokens_completion
1807
native_tokens_completion_images
(null)
native_tokens_reasoning
185
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
0.01819
router
(null)
provider_responses
0
endpoint_id
"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id
"msg_01QFQAeX8bfpJ1sNcgcvBJ3u"
is_byok
false
latency
1885
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-1782891503-Ro0WlOX9SIoyineuY3Gf"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1782891503-sSfeR75aH2zui3Eoxs1K"
upstream_id
"msg_01QFQAeX8bfpJ1sNcgcvBJ3u"
total_cost
0.01819
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
97.12%
Matches word count
n/a
neededClean
false
sentences
9
wordCounts
0
9
1
10
2
10
3
10
4
10
5
10
6
10
7
10
8
10