# Supported Regions, models, and quotas
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## Supported Regions
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Advanced Prompt Optimization is available in the following AWS Regions:
+ US East (N. Virginia) (us-east-1)
+ US East (Ohio) (us-east-2)
+ US West (Oregon) (us-west-2)
+ Canada (Central) (ca-central-1)
+ South America (Sao Paulo) (sa-east-1)
+ Europe (Ireland) (eu-west-1)
+ Europe (London) (eu-west-2)
+ Europe (Frankfurt) (eu-central-1)
+ Europe (Zurich) (eu-central-2)
+ Asia Pacific (Mumbai) (ap-south-1)
+ Asia Pacific (Tokyo) (ap-northeast-1)
+ Asia Pacific (Seoul) (ap-northeast-2)
+ Asia Pacific (Singapore) (ap-southeast-1)
+ Asia Pacific (Sydney) (ap-southeast-2)

## Supported target models
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Advanced Prompt Optimization supports all Amazon Bedrock models that output text modality.

## Supported judge models
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When using the custom LLM-as-a-judge evaluation method, the following models are available as judge models:
+ anthropic.claude-opus-4-6-v1
+ anthropic.claude-sonnet-4-5-20250929-v1:0
+ anthropic.claude-sonnet-4-6

## Quotas
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| Quota | Limit | 
| --- | --- | 
| Concurrent jobs | 20 per account per region | 
| Input file size | 50 MB | 
| Templates per job | 10 | 
| Evaluation samples per template | 100 | 
| Text variables per template | 20 | 
| Multimodal files per sample | 2 | 
| Models per job | 5 | 
| Steering criteria per template | 5 |