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Run: 2026-04-24-01KQ0G8YK3TAKNKAAEZQZP241Q
Run Details
Model:
Claude Opus 4.7 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
9.8s
Cost:
$0.041325
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 on Blackwood Manor for three long days, drumming hard against the windows like impatient fingers. Inspector Hollis stepped carefully through the heavy oak door, shaking cold water from his coat onto the polished marble floor. In the drawing room beyond, a single tall candle burned beside the body of Lord Ashcroft, crumpled near the fireplace. Five guests waited in tense silence, each clutching a drink, each pretending not to notice the dagger on the rug. Hollis removed his hat slowly, surveying every pale face, already certain the killer stood somewhere among these trembling, wealthy strangers. Outside, thunder rolled across the moor like a warning nobody inside the grand old house was yet prepared to hear.
created_at
"2026-04-24T19:43:09.415Z"
4/24/2026, 7:43:09 PM
model
"anthropic/claude-4.7-opus-20260416"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2136
moderation_latency
(null)
generation_time
9730
tokens_prompt
46
tokens_completion
310
native_tokens_prompt
65
native_tokens_completion
1640
native_tokens_completion_images
(null)
native_tokens_reasoning
124
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
0.041325
router
(null)
provider_responses
0
endpoint_id
"0fa65117-00d9-4835-808d-9b68041d9ce4"
id
"69771133-589c-41e5-bd28-c8344ea59cc5"
is_byok
false
latency
665
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-1777059789-DUWsZlFE0QrKNaE1VjpO"
session_id
(null)
api_type
"completions"
id
"gen-1777059789-2KkcYT5HYzYqiJlHjtmx"
upstream_id
"69771133-589c-41e5-bd28-c8344ea59cc5"
total_cost
0.041325
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