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Run: 2026-02-08-01KGYZWHZCMF6122YMD20VBEFP
Run Details
Model:
Claude Haiku 4.5
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
2.3s
Cost:
$0.000714
Provider:
Amazon Bedrock
Evaluation summary
Score
Evaluator
Details Link
73.57%
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 Body in the Library The rain fell heavily on the old mansion that night. Detective Sarah Chen arrived at the scene just after midnight. Lord Ashford lay dead upon the Persian rug in blood. His butler had discovered the body while making the rounds. Everyone in the house was now a suspect, she thought. The study door had been locked from the inside all along. Sarah examined the wound carefully, noting its precise and surgical nature. "Who had access to the study during the evening hours?" she asked. The family gathered in the drawing room, their faces pale and shocked. Nobody wanted to admit they had heard anything at all.
created_at
"2026-02-08T16:03:23.523349+00:00"
2/8/2026, 4:03:23 PM
model
"anthropic/claude-4.5-haiku-20251001"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
512
moderation_latency
154
generation_time
2097
tokens_prompt
35
tokens_completion
130
native_tokens_prompt
44
native_tokens_completion
134
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
0.000714
router
(null)
provider_responses
0
id
"376f0553-9f04-4e64-be59-08947801881d"
status
200
is_byok
false
latency
511
endpoint_id
"d000261c-5aeb-47d1-ac87-ad64dbe1cdb6"
provider_name
"Amazon Bedrock"
model_permaslug
"anthropic/claude-4.5-haiku-20251001"
api_type
"completions"
id
"gen-1770566600-HUomhufQev7GYqGmQE0c"
upstream_id
"376f0553-9f04-4e64-be59-08947801881d"
total_cost
0.000714
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Amazon Bedrock"
Evaluation details
Result
Evaluator
Details
Meta Data
73.57%
Matches word count
n/a
neededClean
false
sentences
11
wordCounts
0
6
1
10
2
10
3
10
4
10
5
10
6
11
7
11
8
12
9
12
10
10