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Run: 2026-07-01-01KWEAG7P9NMQA3J1FWWTHAF77
Run Details
Model:
Claude Sonnet 5 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
14.7s
Cost:
$0.017600
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 hard against the old manor's cracked, dusty windows. Detective Sarah Wren stepped carefully over the old threshold inside. Candles flickered weakly, casting long shadows across the silent hallway. A body lay motionless beside the grand old marble staircase. Blood pooled slowly beneath the victim's cold, outstretched pale hand. Wren knelt down slowly, examining the wound with practiced precision. Something metallic glinted faintly beneath the fallen, overturned wooden chair. She reached for it, hands trembling despite years of training. Outside, thunder cracked violently, rattling the old mansion's windowpanes hard. Wren whispered softly, "This wasn't a simple robbery gone wrong."
created_at
"2026-07-01T07:50:07.826Z"
7/1/2026, 7:50:07 AM
model
"anthropic/claude-sonnet-5-20260630"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3879
moderation_latency
(null)
generation_time
14679
tokens_prompt
46
tokens_completion
329
native_tokens_prompt
60
native_tokens_completion
1748
native_tokens_completion_images
(null)
native_tokens_reasoning
138
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
0.0176
router
(null)
provider_responses
0
endpoint_id
"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id
"msg_01EhDuPaGz8Qqfj4vZsnvZLf"
is_byok
false
latency
1869
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-1782892207-N4EKpAmgNR2XE6q0IAdl"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1782892207-5pazphxOye3w68PEjrpB"
upstream_id
"msg_01EhDuPaGz8Qqfj4vZsnvZLf"
total_cost
0.0176
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