The headline for Codex is environments you can carry: a reusable, cloud-hosted workspace with your approved settings and permissions that starts a task the same way whether you kick it off from your laptop, your phone, or a browser on someone else's machine. The CLI now takes voice input and gained an /agents view for juggling several tasks at once. A new code-review surface in the ChatGPT desktop app reads diffs, summarizes changes, and can take a first pass on your PRs in the cloud before you've even looked. There's a paid speed play, too. Ultrafast — bundled into a new Pro 500 tier — claims up to 8x faster generation in the tool and 6x in the API, aimed squarely at the agent loops where latency, not intelligence, is the bottleneck. Codex Security Cloud rounds it out with on-demand and scheduled repo scanning. If you already live in this thing, the cloud environments are the piece worth trying first; the rest is polish you'll absorb without noticing.