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Run: 2026-02-08-01KGYXAFVP2CPQ26N1NMA9J24X
Run Details
Model:
Claude Opus 4.5
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
7.2s
Cost:
$0.005295
Provider:
Anthropic
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
The mansion loomed above her. Rain pelted the stone steps. Detective Morgan checked her watch. Midnight had just struck twice. Something felt wrong inside here. She pushed the heavy door. It creaked open very slowly. Darkness swallowed the grand foyer. Her flashlight cut through shadows. A chandelier hung above, shattered. Glass crunched beneath her shoes. The smell hit her hard. Copper and roses mixed together. She followed the terrible scent. It led to the study. A body lay face down. Blood pooled on expensive carpet. The victim wore silk pajamas. His hand clutched a letter. Morgan knelt beside the corpse. She recognized him right away. Theodore Blake, the famous billionaire. Someone wanted him dead tonight. The killer was still nearby. Morgan could feel their presence. A floorboard creaked somewhere upstairs. She drew her service weapon. The hunt had finally begun.
created_at
"2026-02-08T15:18:39.014155+00:00"
2/8/2026, 3:18:39 PM
model
"anthropic/claude-4.5-opus-20251124"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1337
moderation_latency
(null)
generation_time
7123
tokens_prompt
35
tokens_completion
180
native_tokens_prompt
44
native_tokens_completion
203
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)
origin
"https://ncbench.com/"
is_byok
false
finish_reason
"stop"
native_finish_reason
"stop"
usage
0.005295
router
(null)
provider_responses
0
id
"msg_01MkUUzyiF5rJn7aLSwAqH51"
status
200
is_byok
false
latency
1337
endpoint_id
"be883404-eb42-4b2d-b6e4-c7daa3aa8d62"
provider_name
"Anthropic"
model_permaslug
"anthropic/claude-4.5-opus-20251124"
api_type
"completions"
id
"gen-1770563911-y2x53HbiOdhf7Crlobq9"
upstream_id
"msg_01MkUUzyiF5rJn7aLSwAqH51"
total_cost
0.005295
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Anthropic"
Evaluation details
Result
Evaluator
Details
Meta Data
100.00%
Matches word count
n/a
neededClean
false
sentences
28
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
23
5
24
5
25
5
26
5
27
5