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Run: 2026-04-24-01KQ0GGBVRCY0EKSK6TVDJ7YYX
Run Details
Model:
Claude Opus 4.7 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
11.9s
Cost:
$0.050900
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 rain had been falling steadily on Blackwood Manor for three consecutive days, drowning the gardens in restless silver pools. Inspector Margaret Hollis arrived at precisely seven o'clock, her wet coat dripping onto marble floors polished by generations of servants. The elderly butler, pale and trembling, led her up the grand staircase toward the library where Lord Ashcombe lay dead. Firelight flickered softly across the victim's stunned expression, illuminating a silver letter opener embedded deep within his starched evening shirt. Five guests waited downstairs in an uneasy silence, each one nursing secrets older than the ancient oaks surrounding the estate. Margaret studied the cooling body carefully, knowing that someone present tonight had smiled warmly before calmly driving that blade home.
created_at
"2026-04-24T19:47:12.379Z"
4/24/2026, 7:47:12 PM
model
"anthropic/claude-4.7-opus-20260416"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2343
moderation_latency
(null)
generation_time
11858
tokens_prompt
46
tokens_completion
381
native_tokens_prompt
65
native_tokens_completion
2023
native_tokens_completion_images
(null)
native_tokens_reasoning
179
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
0.0509
router
(null)
provider_responses
0
endpoint_id
"0fa65117-00d9-4835-808d-9b68041d9ce4"
id
"5a519724-590e-4f8f-bfbf-9a77cf5cc085"
is_byok
false
latency
691
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-1777060032-3VTGDl0RbmYK8ZAnQvQu"
session_id
(null)
api_type
"completions"
id
"gen-1777060032-bDiOHPAb3VNE2GOPSwEw"
upstream_id
"5a519724-590e-4f8f-bfbf-9a77cf5cc085"
total_cost
0.0509
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Amazon Bedrock"
response_cache_source_id
(null)
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