Woofun AI reports that Anthropic has made its Claude 4.x series, including Claude Opus 4.8 and Claude Haiku 4.5, generally available on Microsoft's Azure AI Foundry. These models run directly on NVIDIA GB300 GPU infrastructure. In a reciprocal move, OpenAI has deployed its GPT-5.5 and GPT-5.4 models on Amazon's AWS Bedrock platform, with availability established two months ago.