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Run: 2026-02-08-01KGYYTJQPJG0E7PNJ9YS17A26
Run Details
Model:
Claude Haiku 4.5
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
2.5s
Cost:
$0.000699
Provider:
Amazon Bedrock
Evaluation summary
Score
Evaluator
Details Link
86.27%
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 grandfather clock struck midnight in the empty manor hall. Detective Sarah Chen arrived at the scene within the hour. Lord Ashford lay sprawled across the Persian rug, quite dead. His sterling silver letter opener protruded from between his ribs. No signs of forced entry were discovered anywhere in the house. The study door had been locked from the inside, naturally. His widow claimed she was asleep upstairs all evening. The butler reported hearing nothing unusual during the late night. Yet someone in this house had wanted him permanently gone. Detective Chen removed her notebook and began her careful investigation.
created_at
"2026-02-08T15:44:50.397987+00:00"
2/8/2026, 3:44:50 PM
model
"anthropic/claude-4.5-haiku-20251001"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
720
moderation_latency
171
generation_time
2235
tokens_prompt
35
tokens_completion
123
native_tokens_prompt
44
native_tokens_completion
131
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
0.000699
router
(null)
provider_responses
0
id
"984bf8ba-ab62-4031-8fa8-8c8240fe9be0"
status
200
is_byok
false
latency
720
endpoint_id
"d000261c-5aeb-47d1-ac87-ad64dbe1cdb6"
provider_name
"Amazon Bedrock"
model_permaslug
"anthropic/claude-4.5-haiku-20251001"
api_type
"completions"
id
"gen-1770565487-oy04NtUA7DexjALRa8Hn"
upstream_id
"984bf8ba-ab62-4031-8fa8-8c8240fe9be0"
total_cost
0.000699
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Amazon Bedrock"
Evaluation details
Result
Evaluator
Details
Meta Data
86.27%
Matches word count
n/a
neededClean
false
sentences
11
wordCounts
0
6
1
10
2
10
3
10
4
10
5
11
6
10
7
9
8
10
9
10
10
10