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Run: 2026-07-25-01KYCPMS561STQHBY84APM6WNE
Run Details
Model:
Claude Opus 5
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
9.3s
Cost:
$0.007975
Provider:
Amazon Bedrock
Evaluation summary
Score
Evaluator
Details Link
98.15%
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 like fingers demanding to be admitted. Inspector Alma Reyes stepped over the threshold and smelled copper. The orchids had been arranged in a circle around him. Gerald Pemberton lay face down among the crushed white petals. His right hand still clutched a pair of pruning shears. The blades were clean, which struck her as remarkably strange. Someone had wiped them, or he had never used them. Behind her, the constable coughed and looked anywhere but down. "Housekeeper found him at six," he said, consulting his notebook. "Door was locked from inside, and the key is missing." Alma crouched and studied the soil beneath the dead man. Four shallow depressions marked the earth, evenly spaced and deliberate. Not footprints, she thought, but something heavier had stood there. The rain kept knocking, patient as a creditor at midnight.
created_at
"2026-07-25T13:15:14.477Z"
7/25/2026, 1:15:14 PM
model
"anthropic/claude-opus-5-20260723"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1795
moderation_latency
(null)
generation_time
9173
tokens_prompt
46
tokens_completion
228
native_tokens_prompt
60
native_tokens_completion
307
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
0.007975
router
(null)
provider_responses
0
endpoint_id
"76cb4608-f48c-483d-8da8-9957fb44244e"
id
"msg_011CdNqX7x9M7N2kCfnpgU8z"
is_byok
false
latency
1795
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-1784985314-oA1SDUGl0xv1PY5ydoHa"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1784985314-s5zbeCGpPb1UniaTD9lf"
upstream_id
"msg_011CdNqX7x9M7N2kCfnpgU8z"
total_cost
0.007975
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
98.15%
Matches word count
n/a
neededClean
false
sentences
14
wordCounts
0
11
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