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Run: 2026-07-01-01KWEA5EC8RASWDZGK7TGNKCT7
Run Details
Model:
Claude Sonnet 5 (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
12.1s
Cost:
$0.013240
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, forgotten little seaside town. Detective Mara Voss stood silently beneath the flickering streetlamp outside. A woman's body lay motionless beside the old wooden pier. Her eyes stared blankly at the starless, indifferent midnight sky. No one had heard a single scream or cry tonight. Mara knelt down, examining the strange bruises around her neck. Something metallic glinted faintly beneath the dead woman's pale hand. It was a small, tarnished key, oddly out of place. Mara's pulse quickened, sensing this was no ordinary drowning case. Somewhere in the shadows, the killer watched her every move.
created_at
"2026-07-01T07:44:14.227Z"
7/1/2026, 7:44:14 AM
model
"anthropic/claude-sonnet-5-20260630"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3782
moderation_latency
(null)
generation_time
12014
tokens_prompt
46
tokens_completion
270
native_tokens_prompt
60
native_tokens_completion
1312
native_tokens_completion_images
(null)
native_tokens_reasoning
96
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
0.01324
router
(null)
provider_responses
0
endpoint_id
"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id
"msg_01Q3GicfdK6qjk3dSbwGXwGq"
is_byok
false
latency
1566
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-1782891854-S4pMKbURyVQJHY3UAC9H"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1782891854-oe4lPiGeM7QZLchwbtiR"
upstream_id
"msg_01Q3GicfdK6qjk3dSbwGXwGq"
total_cost
0.01324
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