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Run: 2026-04-24-01KQ0GB7K73W9XBPDXVCPYSJAV
Run Details
Model:
Claude Opus 4.7 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
12.7s
Cost:
$0.051950
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 in heavy sheets across the cobblestones of Ashford Lane, drumming steadily against the windows of number forty-two. Detective Miriam Hollis arrived at the crime scene just past midnight, her coat soaked and her patience already running thin. Inside the parlor, a well-dressed man lay crumpled beside the hearth, a silver letter opener buried deep in his chest. The housekeeper stood trembling near the doorway, clutching a porcelain teacup whose contents had spilled across the polished wooden floor. Miriam knelt beside the body, noting the faint scent of almonds mingling with something sharper, something deeply and unmistakably wrong. She glanced up slowly at the housekeeper and asked, in a voice quieter than the storm, who had visited tonight. The old woman's lips parted, but before she could speak, every lamp in the house flickered and abruptly went out.
created_at
"2026-04-24T19:44:24.17Z"
4/24/2026, 7:44:24 PM
model
"anthropic/claude-4.7-opus-20260416"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2295
moderation_latency
(null)
generation_time
12645
tokens_prompt
46
tokens_completion
390
native_tokens_prompt
65
native_tokens_completion
2065
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
0.05195
router
(null)
provider_responses
0
endpoint_id
"0fa65117-00d9-4835-808d-9b68041d9ce4"
id
"49455e1d-39e3-4e1c-92e9-ee02b45042ec"
is_byok
false
latency
882
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-1777059864-9v7hIpllog2emUrIv8QH"
session_id
(null)
api_type
"completions"
id
"gen-1777059864-NkVJqeucAr8dUoFnTYwD"
upstream_id
"49455e1d-39e3-4e1c-92e9-ee02b45042ec"
total_cost
0.05195
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