# Codex

- [OpenAI Lands on Amazon Bedrock — The Cloud That Already Houses Claude](https://sdd.sh/2026/04/openai-lands-on-amazon-bedrock-the-cloud-that-already-houses-claude.md): After Microsoft's exclusivity expired on April 27, OpenAI moved its models, Codex agent, and a new jointly built Bedrock Managed Agents runtime onto AWS. Amazon now hosts both Anthropic and OpenAI. Here's what the infrastructure power shift means for the AI coding landscape.
- [OpenAI Codex Goes Desktop Agent. It's Still Not Claude Code.](https://sdd.sh/2026/04/openai-codex-goes-desktop-agent.-its-still-not-claude-code..md): OpenAI's April 17 Codex update ships multi-agent desktop control, 90+ MCP plugins, and persistent memory. It's a real step forward in autonomy — built on exactly the wrong architecture.
- [The Three-Layer AI Coding Stack That Nobody Planned (But Everyone Is Building)](https://sdd.sh/2026/04/the-three-layer-ai-coding-stack-that-nobody-planned-but-everyone-is-building.md): Cursor, Claude Code, and OpenAI Codex are not converging into a single winner-take-all tool. They are stratifying into three distinct layers — orchestration, execution, and review — and the most sophisticated developers are building workflows that use all three. Here is what each layer does, why Claude Code wins at the execution layer, and what the emergence of OpenAI's Codex plugin for Claude Code signals about where this is heading.