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Run: 2026-07-01-01KWE9H1SAHB696KF9Q346BTE5
Run Details
Model:
Claude Sonnet 5 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
30.3s
Cost:
$0.041470
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
Rain fell steadily over the old mansion, soaking the gravel path that curved slowly toward the grand front doorway tonight. Detective Mara Voss knelt slowly beside the lifeless body, studying the pale, cold face illuminated by her trembling flashlight beam. The victim, a wealthy banker, lay sprawled across the Persian rug, blood pooling slowly beneath his cold, motionless, silent head. No weapon lay anywhere nearby, only scattered papers and a single, overturned, empty crystal glass beside the crackling fireplace tonight. Mara exhaled sharply, sensing this strange, dark case would soon unravel secrets hidden deep within this grand, old, forgotten house.
created_at
"2026-07-01T07:33:05.971Z"
7/1/2026, 7:33:05 AM
model
"anthropic/claude-sonnet-5-20260630"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3944
moderation_latency
(null)
generation_time
30307
tokens_prompt
46
tokens_completion
491
native_tokens_prompt
60
native_tokens_completion
4135
native_tokens_completion_images
(null)
native_tokens_reasoning
325
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
0.04147
router
(null)
provider_responses
0
endpoint_id
"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id
"msg_01Le7NrqTKY3xdC3eFcmwg6i"
is_byok
false
latency
1745
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-1782891185-h5abof1mTL9FDYo48Ise"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1782891185-79NjR9FOzZhqZx7EMKfV"
upstream_id
"msg_01Le7NrqTKY3xdC3eFcmwg6i"
total_cost
0.04147
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
5
wordCounts
0
20
1
20
2
20
3
20
4
20