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Run: 2026-07-01-01KWE9CR6VVQK8ZADHHCYM8XAX
Run Details
Model:
Claude Sonnet 5 (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
35.8s
Cost:
$0.046200
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 20 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
The old mansion stood silent beneath a sky heavy with storm clouds, its windows dark, hiding many unspoken secrets tonight. Detective Sarah Chen arrived just after midnight, her coat soaked through from the relentless downpour outside the old iron gates. A uniformed officer met her at the entrance, his face pale and clearly shaken by what he'd just seen inside. Inside, the body of Lord Ashford lay sprawled across the cold marble floor, blood pooling silently beneath his motionless head. Sarah knelt beside him, noting a strange, dark bruise marking his pale neck, immediately catching her very trained, watchful eye. She glanced slowly around the grand, silent room, sensing this case would prove far more complicated than she'd ever expected.
created_at
"2026-07-01T07:30:45.096Z"
7/1/2026, 7:30:45 AM
model
"anthropic/claude-sonnet-5-20260630"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3899
moderation_latency
(null)
generation_time
35782
tokens_prompt
46
tokens_completion
595
native_tokens_prompt
60
native_tokens_completion
4608
native_tokens_completion_images
(null)
native_tokens_reasoning
408
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
0.0462
router
(null)
provider_responses
0
endpoint_id
"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id
"msg_01GQQXoCy9E7jqRNBsaaXXxo"
is_byok
false
latency
1763
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-1782891045-86zTOXOQFCum18MKzJwV"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1782891045-SU7qE325clhUinWx4XCM"
upstream_id
"msg_01GQQXoCy9E7jqRNBsaaXXxo"
total_cost
0.0462
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
6
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20