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Run: 2026-04-24-01KQ0G2429K684C8G6BA8XPZ7G
Run Details
Model:
Claude Opus 4.7 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
9.0s
Cost:
$0.033475
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 fell hard against the windows of Ashcroft Manor, drumming a restless rhythm that nobody inside seemed to notice. Detective Marlowe stood beside the body, his coat dripping steadily onto the Persian rug beneath the dead man's outstretched hand. Lord Ashcroft had been stabbed precisely three times, each wound placed with the careful intention of a surgeon's steady hand. Six guests waited silently in the drawing room, each clutching a drink and harboring a secret worth killing a man. Marlowe cleared his throat once, opened his small leather notebook, and prepared to begin the longest night of his career.
created_at
"2026-04-24T19:39:25.645Z"
4/24/2026, 7:39:25 PM
model
"anthropic/claude-4.7-opus-20260416"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
8016
moderation_latency
(null)
generation_time
8915
tokens_prompt
46
tokens_completion
300
native_tokens_prompt
65
native_tokens_completion
1326
native_tokens_completion_images
(null)
native_tokens_reasoning
145
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
0.033475
router
(null)
provider_responses
0
endpoint_id
"0fa65117-00d9-4835-808d-9b68041d9ce4"
id
"7164bf22-4263-464c-a86e-efdca88015fd"
is_byok
false
latency
668
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-1777059565-c0xg220MO9bO0focSpH9"
session_id
(null)
api_type
"completions"
id
"gen-1777059565-jlA4e2g3FwIS6vPWsVpg"
upstream_id
"7164bf22-4263-464c-a86e-efdca88015fd"
total_cost
0.033475
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
5
wordCounts
0
20
1
20
2
20
3
20
4
20