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Run: 2026-07-25-01KYCQQV5RPV91E4MRW4J8MN59
Run Details
Model:
Claude Opus 5 (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
15.3s
Cost:
$0.030475
Provider:
Amazon Bedrock
Evaluation summary
Score
Evaluator
Details Link
84.21%
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. Her name was Margaret Colefax. Someone had arranged her hands. Palms up, fingers gently curled. One white petal rested there. Vale crouched beside the corpse. No blood stained the tiles. The soil smelled faintly sweet. Doyle coughed from the doorway. "The gardener found her, sir. Six o'clock, watering the ferns." Vale did not look up. "Locked doors mean patient killers." Every pane was fastened tight. Yet the orchids were disturbed. Something had walked between rows. Vale straightened, studying the shelves. Twelve pots stood in line. The thirteenth space sat empty. "Doyle, find the missing flower." Rain answered, drumming above them.
created_at
"2026-07-25T13:34:23.426Z"
7/25/2026, 1:34:23 PM
model
"anthropic/claude-opus-5-20260723"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
4099
moderation_latency
(null)
generation_time
15199
tokens_prompt
46
tokens_completion
370
native_tokens_prompt
60
native_tokens_completion
1207
native_tokens_completion_images
(null)
native_tokens_reasoning
185
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
0.030475
router
(null)
provider_responses
0
endpoint_id
"76cb4608-f48c-483d-8da8-9957fb44244e"
id
"msg_011CdNrypLMXRNGW8EUYYhXx"
is_byok
false
latency
1499
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-1784986463-h5Hwwtl345V1rRvwvFiF"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1784986463-zeLC52r4UPGHuKlwsQdm"
upstream_id
"msg_011CdNrypLMXRNGW8EUYYhXx"
total_cost
0.030475
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
84.21%
Matches word count
n/a
neededClean
false
sentences
19
wordCounts
0
5
1
5
2
5
3
5
4
5
5
5
6
5
7
5
8
5
9
5
10
5
11
15
12
10
13
5
14
5
15
5
16
5
17
5
18
10