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Run: 2026-07-25-01KYCPVHD975PGQYJW3DJ6JXBJ
Run Details
Model:
Claude Opus 5
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
9.2s
Cost:
$0.009050
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
The rain hammered the tin roof of Ashcombe Manor's conservatory. Inspector Halloran removed her hat and shook water from it. Inside, seven guests sat frozen around a long oak table. Between them lay Sir Edmund Thorne, quite thoroughly and finally dead. A silver letter opener protruded from beneath his starched collar. Nobody spoke, though somebody had certainly screamed twenty minutes prior. "Which of you found him?" Halloran asked the pale room. Six hands rose slowly, hesitantly, then lowered again in confusion. The seventh guest kept both hands hidden beneath the tablecloth. Halloran noted this carefully and said absolutely nothing about it. Lightning flashed, illuminating the wine glasses, each one drained empty. Except one, which remained full, untouched, waiting for someone else. "Nobody leaves this house tonight," she said, closing the door. Somewhere upstairs, a floorboard creaked beneath the weight of secrets.
created_at
"2026-07-25T13:18:55.919Z"
7/25/2026, 1:18:55 PM
model
"anthropic/claude-opus-5-20260723"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2300
moderation_latency
(null)
generation_time
9033
tokens_prompt
46
tokens_completion
237
native_tokens_prompt
60
native_tokens_completion
350
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
0.00905
router
(null)
provider_responses
0
endpoint_id
"76cb4608-f48c-483d-8da8-9957fb44244e"
id
"msg_011CdNqoTN9N4BnPhGWg2QvW"
is_byok
false
latency
2300
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-1784985535-p8WdnMI6ptLxNKctD3CG"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1784985535-t5yGGJHc1ugXEhTYtVdE"
upstream_id
"msg_011CdNqoTN9N4BnPhGWg2QvW"
total_cost
0.00905
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
10
1
10
2
10
3
11
4
10
5
10
6
10
7
10
8
10
9
10
10
10
11
10
12
10
13
10