AWS – Amazon Bedrock now provides simplified access to OpenAI open weight models

On August 5, 2025, AWS announced the availability of two new OpenAI models with open weights in Amazon Bedrock. Today, we’re simplifying access to these foundation models by making them automatically available to all Amazon Bedrock users, eliminating the need to explicitly enable model access. Customers can immediately start using these models through the Amazon Bedrock Console playground or through Amazon Bedrock’s unified API in AWS SDK in the regions where the models are available.

This streamlined access enables customers to quickly begin using OpenAI’s gpt-oss-120b and gpt-oss-20b models without needing to manually activate model access.Soon, we will extend this simplified access approach to other existing non-legacy serverless models in Amazon Bedrock. Going forward, Amazon Bedrock will launch all new serverless foundation models with default access for AWS accounts. Account administrators retain full control over model access through IAM policies and Service Control Policies (SCPs) to restrict model usage as needed.

For information about implementing access controls, visit our documentation and our blog post on implementing least privilege access in Amazon Bedrock. To get started with GPT-OSS models, visit the Amazon Bedrock Console.

Read More for the details.