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Run: 2026-07-01-01KWE9BDZK2JC2SYW30MVAG1C9
Run Details
Model:
Claude Sonnet 5 (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
12.8s
Cost:
$0.014030
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 hammered hard against the mansion's windows, cold and relentless. Detective Mara Voss stood silently within the grand marble foyer. A body lay sprawled beneath the crystal chandelier's soft glow. Lord Ashford's eyes stared blankly toward the painted ceiling above. Nobody in the household claimed to have heard anything unusual. Mara knelt down, examining the wound just below his ribs. A single silver key lay clutched within his cold fingers. Outside, thunder rolled ominously across the darkened, stormy countryside sky. Someone inside this house, she thought grimly, was lying tonight. The killer, Mara knew, was still somewhere within these walls.
created_at
"2026-07-01T07:30:01.857Z"
7/1/2026, 7:30:01 AM
model
"anthropic/claude-sonnet-5-20260630"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3614
moderation_latency
(null)
generation_time
12768
tokens_prompt
46
tokens_completion
283
native_tokens_prompt
60
native_tokens_completion
1391
native_tokens_completion_images
(null)
native_tokens_reasoning
118
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
0.01403
router
(null)
provider_responses
0
endpoint_id
"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id
"msg_01MB14Txs7rb2UgRF4QRBUMZ"
is_byok
false
latency
1569
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-1782891001-AvfnIzZRVfvVhpB2VmOl"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1782891001-aZ92jwBHkNryAq1w4SY8"
upstream_id
"msg_01MB14Txs7rb2UgRF4QRBUMZ"
total_cost
0.01403
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