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Run: 2026-07-25-01KYCPR97CFRQA2X11YRW14ZTF
Run Details
Model:
Claude Opus 5
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
8.9s
Cost:
$0.009750
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 the greenhouse roof like impatient fingers on glass. Inspector Halloway ducked beneath a curtain of dripping fuchsia blooms. The body lay face down among shattered terracotta and soil. Someone had arranged white orchids in a circle around him. "Gardener found him at six," said Sergeant Voss, wiping rain. Halloway crouched, noting the absence of blood on the flagstones. No wound marked the skull, no bruise darkened the neck. The dead man's hands were clean, his fingernails immaculately trimmed. That detail bothered Halloway more than the flowers or silence. A gardener's hands should carry dirt beneath every single nail. "Who is he?" she asked, though she already suspected everything. Voss consulted his notebook, squinting through the gray morning light. "Edmund Ashcroft. He owned this house and everything surrounding it." Halloway stood slowly, her knees protesting the damp cold stone. Above her, the glass panes wept long streaks of water. Somewhere beyond the ferns, a door closed very, very quietly.
created_at
"2026-07-25T13:17:09.234Z"
7/25/2026, 1:17:09 PM
model
"anthropic/claude-opus-5-20260723"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1755
moderation_latency
(null)
generation_time
8830
tokens_prompt
46
tokens_completion
269
native_tokens_prompt
60
native_tokens_completion
378
native_tokens_completion_images
(null)
native_tokens_reasoning
0
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
0.00975
router
(null)
provider_responses
0
endpoint_id
"76cb4608-f48c-483d-8da8-9957fb44244e"
id
"msg_011CdNqfaSZytfhTq5YH8GiH"
is_byok
false
latency
1754
model_permaslug
"anthropic/claude-opus-5-20260723"
provider_name
"Amazon Bedrock"
status
200
user_agent
"langchainjs-openai/1.0.0 ((node/v24.18.0; linux; x64))"
http_referer
(null)
request_id
"req-1784985429-Se9oz0wlqsLp0ETQ0r9J"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1784985429-1fMKRlCPjhEzvp1c5x37"
upstream_id
"msg_011CdNqfaSZytfhTq5YH8GiH"
total_cost
0.00975
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
16
wordCounts
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10
8
10
9
10
10
10
11
10
12
10
13
10
14
10
15
10