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Run: 2026-07-01-01KWE8Y64A6CJY7H15EH3NVHXV
Run Details
Model:
Claude Sonnet 5 (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
15.1s
Cost:
$0.018200
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 10 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
Rain fell steadily upon the old manor's gray slate roof. Detective Hale stood silently beside the cold body near midnight. Blood pooled darkly across the polished, ancient oak library floor. The victim's glassy eyes stared upward, frozen in silent terror. Someone had extinguished every candle except one flickering, dying flame. Hale knelt down slowly, examining the wound with practiced care. A single letter lay crumpled beside the victim's cold hand. The manor's other guests slept soundly, unaware of the horror. Somewhere upstairs, an old clock struck twelve with hollow chimes. Detective Hale already knew this night would haunt him forever.
created_at
"2026-07-01T07:22:47.828Z"
7/1/2026, 7:22:47 AM
model
"anthropic/claude-sonnet-5-20260630"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3597
moderation_latency
(null)
generation_time
15065
tokens_prompt
46
tokens_completion
313
native_tokens_prompt
60
native_tokens_completion
1808
native_tokens_completion_images
(null)
native_tokens_reasoning
135
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"
service_tier
"default"
usage
0.0182
router
(null)
provider_responses
0
endpoint_id
"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id
"msg_01PAbyXLnEZy8937D3qM65LM"
is_byok
false
latency
1643
model_permaslug
"anthropic/claude-sonnet-5-20260630"
provider_name
"Amazon Bedrock"
status
200
user_agent
"langchainjs-openai/1.0.0 ((node/v24.17.0; linux; x64))"
http_referer
(null)
request_id
"req-1782890567-DcearocoCPHzTh3hQdGJ"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1782890567-sgVEDA2gnsGoxNMk4PuT"
upstream_id
"msg_01PAbyXLnEZy8937D3qM65LM"
total_cost
0.0182
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Amazon Bedrock"
response_cache_source_id
(null)
data_region
"global"
Evaluation details
Result
Evaluator
Details
Meta Data
100.00%
Matches word count
n/a
neededClean
false
sentences
10
wordCounts
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10
8
10
9
10