Amazon Launches OpenAI Model Offerings on AWS Following Microsoft Exclusivity End

Amazon Web Services announced on April 28, 2026, that it will offer OpenAI models through its Bedrock service, just one day after OpenAI and Microsoft terminated their exclusivity agreement that had prevented such partnerships. The revised Microsoft-OpenAI agreement, announced April 27, 2026, ended Microsoft's exclusive rights to OpenAI products and enabled OpenAI to sign an up-to-$50-billion deal with Amazon. AWS now offers OpenAI's latest models including the Codex code-writing service and launched Bedrock Managed Agents, a new product specifically designed for OpenAI's reasoning models. The partnership shift reflects a deteriorating Microsoft-OpenAI relationship, with both companies turning to their partner's biggest rivals—OpenAI to AWS and Oracle, Microsoft to Anthropic's Claude for a new agent offering.

End of Microsoft's Exclusive Rights to OpenAI Products

• ▪OpenAI announced a revised agreement with Microsoft on Monday, April 27, 2026
• ▪The Microsoft/OpenAI relationship has reportedly been deteriorating for some time
• ▪The revised OpenAI/Microsoft agreement solved OpenAI's problem of allowing AWS to offer OpenAI products
• ▪Microsoft no longer has exclusive rights to any OpenAI products as of April 28, 2026

Amazon's Integration of OpenAI Models into AWS Bedrock

• ▪Amazon announced on Tuesday, April 28, 2026, that AWS's Bedrock service now has OpenAI's latest models
• ▪OpenAI signed an up-to-$50-billion deal with Amazon
• ▪Bedrock Managed Agents offers features like agent steering and security
• ▪Amazon CEO Andy Jassy tweeted that the revised OpenAI/Microsoft agreement was a very interesting announcement
• ▪AWS Bedrock is Amazon's AI app building and model-choosing service
• ▪AWS's Bedrock service now offers OpenAI's code-writing service Codex
• ▪Amazon launched Bedrock Managed Agents, a new product for creating OpenAI-powered AI agents
• ▪Bedrock Managed Agents is specifically designed to use OpenAI's reasoning models

Shifting Alliances Among Tech Giants in AI Competition

• ▪Microsoft has turned to Anthropic as a partner
• ▪Microsoft is working on a new agent offering powered by Claude
• ▪Microsoft and OpenAI have each found comfort in the arms of their partner's biggest rival

Perspective of Microsoft

• ▪Microsoft has found comfort in partnering with Anthropic, OpenAI's biggest rival

Perspective of OpenAI

• ▪OpenAI secured an up-to-$50-billion deal with Amazon following the end of Microsoft exclusivity
• ▪OpenAI has turned to both AWS and Oracle as new cloud infrastructure partners