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Run: 2026-07-25-01KYCR737H0PZ4HM38HR71C081
Run Details
Model:
Claude Opus 5 (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
17.3s
Cost:
$0.038850
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 glass at seventeen minutes past midnight. Detective Nora Vance had not slept in thirty-one long hours. The body lay among the orchids, arms folded like prayer. The dead man was Gerald Ashgrove, host of tonight's party. No wound showed, no blood, no bruise, no clear cause. Someone had washed his hands and trimmed his fingernails carefully. Nora crouched, studying the pale skin beneath his wedding band. The ring was new, and it fit him too tightly. Behind her, the young constable coughed and apologized for something. "Nobody enters this room again until I say so, understood?" The constable nodded, though his eyes drifted toward the door. Outside, forty guests waited in a ballroom, still wearing masks. One of them had knelt here and prayed over him. Nora stood, brushed soil from her knees, and started counting.
created_at
"2026-07-25T13:42:43.197Z"
7/25/2026, 1:42:43 PM
model
"anthropic/claude-opus-5-20260723"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3740
moderation_latency
(null)
generation_time
17200
tokens_prompt
46
tokens_completion
467
native_tokens_prompt
60
native_tokens_completion
1542
native_tokens_completion_images
(null)
native_tokens_reasoning
245
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
0.03885
router
(null)
provider_responses
0
endpoint_id
"76cb4608-f48c-483d-8da8-9957fb44244e"
id
"msg_011CdNscf4nBMfrg2ZCtFTPE"
is_byok
false
latency
1455
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-1784986963-RpL0PIS3ptDal3hcbrSj"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1784986963-1yOUFKUep3UOEeSsBOfo"
upstream_id
"msg_011CdNscf4nBMfrg2ZCtFTPE"
total_cost
0.03885
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
14
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