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Run: 2026-07-25-01KYCRANV4Q8RXWWMJ0XMH1Y7W
Run Details
Model:
Claude Opus 5 (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
14.4s
Cost:
$0.028900
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 5 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. Inspector Vale hated wet mornings. The body lay among orchids. Someone had arranged her hands. Palms up, fingers gently curled. A white bloom between them. Vale crouched beside the corpse. Her wristwatch had stopped working. Eleven forty, the crystal cracked. Constable Reed cleared his throat. The gardener found her here. He hasn't stopped shaking since. Vale studied the humid air. Nothing smelled like death yet. Only soil, water, and blossoms. Whoever killed Margaret loved flowers. Reed wrote that down carefully. The greenhouse door was locked. Locked from the inside, apparently. Eleven guests waited indoors, watching. One of them was lying. Vale stood and buttoned up. Let's begin with the gardener.
created_at
"2026-07-25T13:44:40.557Z"
7/25/2026, 1:44:40 PM
model
"anthropic/claude-opus-5-20260723"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3988
moderation_latency
(null)
generation_time
14285
tokens_prompt
46
tokens_completion
326
native_tokens_prompt
60
native_tokens_completion
1144
native_tokens_completion_images
(null)
native_tokens_reasoning
136
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
0.0289
router
(null)
provider_responses
0
endpoint_id
"76cb4608-f48c-483d-8da8-9957fb44244e"
id
"msg_011CdNsmJk9z76KhkYPL4KLT"
is_byok
false
latency
1462
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-1784987080-cxWBZX3buSJ3H5ekOxSx"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1784987080-3ge8W4Gqgc0B8G171LFA"
upstream_id
"msg_011CdNsmJk9z76KhkYPL4KLT"
total_cost
0.0289
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
23
wordCounts
0
5
1
5
2
5
3
5
4
5
5
5
6
5
7
5
8
5
9
5
10
5
11
5
12
5
13
5
14
5
15
5
16
5
17
5
18
5
19
5
20
5
21
5
22
5