OpenAI Expands to AWS Bedrock, Ending Microsoft Exclusivity
SAN FRANCISCO — OpenAI is bringing its GPT-5.5 model to Amazon Web Services’ Bedrock platform, ending Microsoft’s exclusive cloud distribution rights to the company’s advanced AI models, according to Forbes.
The move opens OpenAI’s flagship technology to enterprises that have built their infrastructure on AWS rather than Microsoft Azure. The decision comes amid reported tensions in the Microsoft-OpenAI partnership that began in 2019.
Amazon may be the biggest winner from the shakeup, according to an analysis by The Motley Fool. The investment publication argues that AWS and its Bedrock AI platform are positioned to capture enterprise customers who want access to OpenAI’s models without committing to the Azure ecosystem. Bedrock, Amazon’s managed service for deploying foundation models from multiple providers, now adds OpenAI to an already diverse roster of AI model makers.
The partnership restructuring reflects a broader trend in enterprise AI, where customers increasingly demand model choice and multi-cloud flexibility rather than vendor lock-in. By distributing through AWS, OpenAI gains access to the largest share of the cloud infrastructure market — AWS commands roughly 31% of global cloud spending, compared to Azure’s approximately 25%, according to recent industry estimates.
For Microsoft, which has reportedly invested more than $13 billion in OpenAI and built much of its Copilot product line around the startup’s models, the loss of exclusivity could erode a key competitive advantage in the cloud services market. Azure’s AI positioning has been closely tied to its privileged access to OpenAI’s technology.
The expansion also comes as OpenAI pursues a for-profit corporate restructuring. By distributing through multiple cloud providers, OpenAI reduces its reliance on any single cloud partner.
Companies that previously faced a choice between their preferred cloud provider and access to OpenAI’s models can now access both on AWS infrastructure, broadening the potential reach of GPT-5.5 across industries that have standardized on AWS.
The cloud AI market, which some analysts project will exceed $200 billion annually by 2028, now features multiple providers competing for enterprise AI workloads. Google Cloud, which offers its own Gemini models and hosts third-party models through Vertex AI, now faces a more competitive AWS armed with both Anthropic’s Claude models and OpenAI’s GPT series.
