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Run: 2026-07-01-01KWE8RSC4Q921RVQCZTT23YN0
Run Details
Model:
Claude Sonnet 5
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
9.7s
Cost:
$0.004650
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 Manor's Secret Rain hammered the ancient windows while thunder rolled across the darkened hills beyond Blackwood Manor's gates. Detective Sarah Chen stepped inside, shaking water from her coat before the fireplace's dying embers. Twelve guests remained trapped since the storm severed the only bridge connecting them to town. Lord Pemberton's body lay sprawled across his study floor, blood pooling beneath his silver head. The butler discovered him precisely at midnight, his scream echoing through empty marble corridors upstairs. Sarah examined the scene carefully, noting the overturned chair and scattered papers across his desk. A single wine glass sat untouched, its contents glistening darkly beneath flickering candlelight nearby. Nobody had heard anything unusual, they claimed, despite thin walls throughout this Victorian-era mansion. Six family members stood accused silently, each harboring secrets deadly enough to justify murder. The victim's will mentioned changes made yesterday, changes nobody outside his lawyer supposedly knew. Sarah pulled her notebook out, ready to unravel this tangled web of lies. Outside, the storm intensified further, mirroring the chaos brewing within these ancient walls tonight. Someone here was lying, and she intended to discover exactly who and why.
created_at
"2026-07-01T07:19:50.928Z"
7/1/2026, 7:19:50 AM
model
"anthropic/claude-sonnet-5-20260630"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2123
moderation_latency
145
generation_time
9531
tokens_prompt
46
tokens_completion
350
native_tokens_prompt
60
native_tokens_completion
453
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
0.00465
router
(null)
provider_responses
0
endpoint_id
"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id
"msg_01Um1sz4PZ697AukdL5fwpD7"
is_byok
false
latency
2123
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-1782890390-9Yb2QRZRPQsKgc7UaRs7"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1782890390-db2YXkvsWVwv9qASyNcT"
upstream_id
"msg_01Um1sz4PZ697AukdL5fwpD7"
total_cost
0.00465
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
14
wordCounts
0
4
1
16
2
15
3
15
4
15
5
15
6
15
7
14
8
14
9
14
10
14
11
13
12
14
13
13