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Run: 2026-07-01-01KWE8X5ST930F2VQY9XRA4X25
Run Details
Model:
Claude Sonnet 5
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
9.0s
Cost:
$0.004890
Provider:
Amazon Bedrock
Evaluation summary
Score
Evaluator
Details Link
0.00%
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 Vanishing Hour Rain fell steadily on the manor's ancient roof, drowning out whatever sounds waited inside its walls. Detective Sarah Chen parked her car beneath the crooked oak tree that guarded the entrance. The butler stood motionless at the door, his face pale as the storm clouds above. "She's in the library," he whispered, gesturing toward the hallway with a trembling hand. Sarah nodded once and stepped past him, her shoes echoing against the marble floor. The library door was open, revealing a scene that made her stomach tighten. Lord Ashford lay sprawled across his desk, blood pooling beneath his silver head. Books had fallen from their shelves, scattered like broken promises across the Persian rug. A single candle flickered on the windowsill, casting shadows that danced with secrets. Sarah knelt beside the body, careful not to disturb the evidence surrounding it. The murder weapon was nowhere in sight, which troubled her more than expected. Whoever did this had planned carefully, leaving no obvious trace behind. She glanced toward the window, noticing it was locked from inside. Outside, thunder rumbled ominously, matching the storm gathering within her thoughts. Six guests remained trapped in this house, and one of them was lying. Sarah stood slowly, smoothing her coat, already calculating her first move forward. The night had only begun, and truth demanded she uncover it.
created_at
"2026-07-01T07:22:14.726Z"
7/1/2026, 7:22:14 AM
model
"anthropic/claude-sonnet-5-20260630"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1612
moderation_latency
(null)
generation_time
8973
tokens_prompt
46
tokens_completion
361
native_tokens_prompt
60
native_tokens_completion
477
native_tokens_completion_images
(null)
native_tokens_reasoning
0
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
0.00489
router
(null)
provider_responses
0
endpoint_id
"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id
"msg_01Fh3asUK3jgytqrQGyLo9tj"
is_byok
false
latency
1612
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-1782890534-BLEVFHYnRfalJr4JzrGo"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1782890534-wWAHpo9uv353KwmqETIc"
upstream_id
"msg_01Fh3asUK3jgytqrQGyLo9tj"
total_cost
0.00489
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
0.00%
Matches word count
n/a
neededClean
false
sentences
18
wordCounts
0
4
1
16
2
15
3
15
4
14
5
14
6
13
7
13
8
14
9
13
10
13
11
13
12
11
13
11
14
11
15
13
16
12
17
11