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Run: 2026-04-24-01KQ0G1DCZTXYXT7BSRD8EBEEN
Run Details
Model:
Claude Opus 4.7 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
13.0s
Cost:
$0.056100
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 cold rain had been falling over Blackwood Manor for three straight days, drumming against the windows like impatient fingers. Detective Harlow Finch arrived just before dawn, her long wool coat soaked through, her boots caked with thick, unforgiving mud. The elderly butler met her at the door, his face pale as parchment, his hands trembling against the silver tray. Inside, the grand staircase spiraled upward into darkened shadow, where a single chandelier swayed gently above the polished marble floor. At the foot of the stairs lay Lord Ashcombe, his eyes open, his throat marked by a single crimson line. Harlow knelt beside the body, studying the wound, then glanced up toward the landing where twelve guests stood watching silently. One of them, she knew with absolute certainty, had quietly walked down these stairs only hours before to commit murder.
created_at
"2026-04-24T19:39:02.435Z"
4/24/2026, 7:39:02 PM
model
"anthropic/claude-4.7-opus-20260416"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2266
moderation_latency
(null)
generation_time
12949
tokens_prompt
46
tokens_completion
386
native_tokens_prompt
65
native_tokens_completion
2231
native_tokens_completion_images
(null)
native_tokens_reasoning
170
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
0.0561
router
(null)
provider_responses
0
endpoint_id
"0fa65117-00d9-4835-808d-9b68041d9ce4"
id
"c101293a-d51b-402c-878b-9724e7ed29d2"
is_byok
false
latency
677
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-1777059542-bFBAHqiTUmOGQH7c3UZo"
session_id
(null)
api_type
"completions"
id
"gen-1777059542-SPm7tGBaVZeMp6mjLRrV"
upstream_id
"c101293a-d51b-402c-878b-9724e7ed29d2"
total_cost
0.0561
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
7
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20