OpenAI overhauls Codex CLI with fullscreen UI, parallel agents and voice

On September 30, OpenAI officially announced a major revamp of Codex CLI, its command-line AI coding tool, targeting heavy terminal developers, and stressed its continued investment in Codex CLI development.

Confirmed

• New full-screen interface: significantly improved readability; the input box (composer) is pinned to the bottom, so you can type without scrolling back to the top in long sessions; history beyond the terminal's scrollback buffer loads automatically as you scroll.
• Parallel agent management: a new /agents view shows running agents, checks progress, and lets you jump between tasks, making it easy to delegate work and track multiple tasks in one place.
• Context forking: a new /fork command forks the current conversation into a separate worktree, keeping the same context but using its own checkout.
• Voice interaction: tasks can be started and steered by voice.
• Daily workflow improvements: including editing prompts, resuming sessions, and using git worktrees; the terminal UI has also been refined.

Why it matters

This update turns Codex CLI from a single interactive assistant into a terminal workbench that can orchestrate multiple agents at once — the combination of /agents and /fork lets developers run parallel task lines in one terminal, and voice launch further lowers the interaction barrier, signaling OpenAI's intent to compete on command-line developer experience.

2026-09-30 ~ 2026-09-30 · 9 related posts

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