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Run: 2026-04-24-01KPZTZTM27W13E6EF65YX72DE
Run Details
Model:
Claude Opus 4.7
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
6.1s
Cost:
$0.011775
Provider:
Amazon Bedrock
Evaluation summary
Score
Evaluator
Details Link
49.67%
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 lashed against the windows of Blackthorn Manor as Detective Sarah Chen stepped carefully across the threshold into darkness. The butler stood trembling beside the grand staircase, his weathered hands clutching a silver tray with obvious difficulty. Lightning illuminated the foyer briefly, revealing crimson footprints leading away from the body sprawled across the marble floor. Lord Pemberton lay motionless in his evening attire, a jeweled letter opener protruding from between his stiffened shoulder blades. Sarah knelt beside the corpse, noting the peculiar expression frozen upon the dead aristocrat's surprisingly peaceful aging face. Five guests huddled together in the adjacent parlor, their whispered conversations ceasing immediately upon her measured, deliberate arrival. Each suspect wore expensive clothing stained with something darker than wine, though nobody seemed willing to acknowledge this fact. The grandfather clock chimed midnight exactly, its mournful tones echoing through corridors that had witnessed generations of Pemberton family secrets. Sarah removed her notebook slowly, understanding that somewhere within these walls hid a murderer wearing a perfectly convincing innocent mask. Tonight, she knew, would test every investigative skill she had painstakingly acquired during fifteen years of solving impossible crimes.
created_at
"2026-04-24T13:31:10.353Z"
4/24/2026, 1:31:10 PM
model
"anthropic/claude-4.7-opus-20260416"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1011
moderation_latency
(null)
generation_time
6034
tokens_prompt
46
tokens_completion
339
native_tokens_prompt
65
native_tokens_completion
458
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"
usage
0.011775
router
(null)
provider_responses
0
endpoint_id
"0fa65117-00d9-4835-808d-9b68041d9ce4"
id
"e33e7342-0323-4177-b0e4-eeaf5647b2cb"
is_byok
false
latency
1011
model_permaslug
"anthropic/claude-4.7-opus-20260416"
provider_name
"Amazon Bedrock"
status
200
user_agent
"langchainjs-openai/1.0.0 ((node/v24.14.1; linux; x64))"
http_referer
(null)
request_id
"req-1777037470-fTKMSxQtzvvRP0aikhDH"
session_id
(null)
api_type
"completions"
id
"gen-1777037470-qqYWt1FXEcLMRKtZzmpy"
upstream_id
"e33e7342-0323-4177-b0e4-eeaf5647b2cb"
total_cost
0.011775
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Amazon Bedrock"
response_cache_source_id
(null)
Evaluation details
Result
Evaluator
Details
Meta Data
49.67%
Matches word count
n/a
neededClean
false
sentences
10
wordCounts
0
19
1
18
2
18
3
19
4
18
5
18
6
19
7
20
8
20
9
19