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Run: 2026-04-24-01KQ0G9HCT03AEYMRJ3X57P1QA
Run Details
Model:
Claude Opus 4.7 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
20.7s
Cost:
$0.102725
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 hammered furiously against the tall windows of Ashcombe Manor as Detective Inspector Margaret Hollis stepped carefully inside. A solitary candle still burned low upon the polished mahogany table, flickering weakly beside a nearly empty glass of claret. Lord Ashcombe himself lay slumped across his worn leather armchair, with one pale hand still clutching a crumpled, bloodstained letter. Margaret knelt slowly beside the cooling body, her trained eyes sweeping across the scene for any detail that seemed unusual. Outside, the thunder cracked violently overhead, and somewhere within the darkened house, a floorboard creaked beneath a very careful footstep. Margaret's gloved hand drifted slowly toward the revolver at her hip as she realized the killer had never actually left.
created_at
"2026-04-24T19:43:28.669Z"
4/24/2026, 7:43:28 PM
model
"anthropic/claude-4.7-opus-20260416"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2268
moderation_latency
(null)
generation_time
20684
tokens_prompt
46
tokens_completion
516
native_tokens_prompt
65
native_tokens_completion
4096
native_tokens_completion_images
(null)
native_tokens_reasoning
317
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
0.102725
router
(null)
provider_responses
0
endpoint_id
"0fa65117-00d9-4835-808d-9b68041d9ce4"
id
"f97416b3-4ecf-4c81-bafa-8022fe8a8619"
is_byok
false
latency
901
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-1777059808-NpSzEuEmxsMXAvvi2hwN"
session_id
(null)
api_type
"completions"
id
"gen-1777059808-pP02Y1ex95CPkqJjEBc1"
upstream_id
"f97416b3-4ecf-4c81-bafa-8022fe8a8619"
total_cost
0.102725
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