TLDR: Amazon Web Services (AWS) has announced the immediate availability of OpenAI’s new open-weight foundation models, gpt-oss-120b and gpt-oss-20b, on its Amazon Bedrock and Amazon SageMaker AI platforms. This integration marks the first time OpenAI’s open-weight models are widely accessible to millions of AWS customers, significantly expanding access to powerful generative AI tools and reinforcing AWS’s commitment to offering a diverse selection of AI models.
Amazon Web Services (AWS) today, August 5, 2025, made a significant announcement, revealing the immediate availability of OpenAI’s new open-weight foundation models, gpt-oss-120b and gpt-oss-20b, on its leading cloud platforms, Amazon Bedrock and Amazon SageMaker AI. This strategic integration marks a pivotal moment, as it is the first time OpenAI’s open-weight models are being widely offered to enterprises through AWS, making their advanced generative AI technology accessible to millions of AWS customers globally.
The introduction of these two new models, gpt-oss-120b and gpt-oss-20b, is set to empower organizations with more powerful AI capabilities. These models are lauded for their advanced reasoning capabilities, making them exceptionally well-suited for a variety of complex applications, including agentic workflows, sophisticated coding tasks, in-depth scientific analysis, and intricate mathematical problem-solving. Furthermore, they support instruction-following and tool use, and boast a substantial 128K token context window, enabling them to process and understand long documents and extended conversations.
A key highlight of this announcement is the impressive price-performance efficiency of the new models. According to AWS, when running in Amazon Bedrock, the larger gpt-oss-120b model delivers up to three times better price-performance than comparable Google Gemini models, five times better than DeepSeek-R1, and twice as efficient as OpenAI’s own o4 model. This efficiency is expected to provide substantial cost benefits for enterprise users.
This move by AWS underscores its ongoing commitment to providing customers with a broad selection of AI models. Atul Deo, Director of Product at AWS, emphasized this point, stating, “Open weight models are an important area of innovation in the future development of generative AI technology, which is why we have invested in making AWS the best place to run them—including those launching today from OpenAI.” He further added, “The addition of OpenAI as our newest open weight model provider marks a natural progression in our commitment to bringing cutting-edge AI to organisations worldwide, and the unmatched size of our customer base marks a transformative shift in access to OpenAI’s advanced technology.”
Dmitry Pimenov, Product Lead at OpenAI, also commented on the collaboration, highlighting the broader impact: “Our open weight models help developers—from solo builders to large enterprise teams—unlock new possibilities across industries and use cases.” AWS CEO Matt Garman echoed this sentiment, calling it a ‘powerhouse combination’ that ‘brings together OpenAI’s leading technology with AWS’ scale, security and deployment capabilities.’ Garman stressed the importance of model choice in the AI era, affirming AWS’s dedication to providing customers with the freedom to select the optimal tools for their unique business challenges.
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In terms of safety and responsible deployment, OpenAI’s models are integrated with Amazon Bedrock’s Guardrails, which are capable of blocking up to 88% of harmful content through configurable filters. The models have also undergone comprehensive safety evaluations to ensure secure and responsible use. OpenAI’s inclusion on AWS platforms places them alongside other prominent open-weight model providers such as DeepSeek, Meta, and Mistral AI, further enriching the ecosystem of generative AI tools available to AWS customers.
