OpenAI Codex CLI — September 2026 Releases
20 releases in September 2026.
What's new in OpenAI Codex CLI, September 2026
OpenAI Codex CLI adds GPT-6 models, worktrees, voice and a fullscreen TUI
OpenAI Codex CLI's main changes in September 2026 are new GPT-6 model options, experimental worktree isolation that became default-on, voice conversations and an optional fullscreen UI. Twenty releases shipped, from rust-v0.152.0 to rust-v0.159.3, plus a python-v0.154.0 SDK release.
On models, GPT-6-Astra arrived in the picker and Amazon Bedrock catalogs, GPT-6 Sol and Luna followed in v0.156.1 and v0.157.0, and v0.159.1 made GPT-6.1 Sol the bundled default. For workflow, --worktree and /worktree create isolated checkouts, /voice and an F8 toggle handle voice, /tui opts into fullscreen with transcript search, and /usage shows an analytics dashboard. Vim mode gained / and ? search, undo and redo, and R replace mode. Opt-in instantinterrupt lets new input steer Codex mid-response.
Security and platform work included approval prompts for elevated-permission commands, Windows and Linux sandbox fixes, and MCP OAuth improvements. Several point releases were hotfixes for model catalogs and Windows console flashing.
- GPT-6-Astra, then GPT-6 Sol and Luna, added to the model picker and Bedrock catalogs; GPT-6.1 Sol became the bundled default (v0.154.0, v0.157.0, v0.159.1)
- Experimental worktree isolation via --worktree or /worktree, enabled by default in v0.156.0 (v0.154.0, v0.156.0)
- Voice conversations with /voice and an F8 toggle, on by default (v0.155.0, v0.156.0)
- Optional fullscreen UI via /tui with transcript search and mouse selection, fullscreen transcripts default in v0.157.0 (v0.156.0)
- /usage analytics dashboard for account usage, token totals and plugin and skill activity (v0.156.0)
- Opt-in instantinterrupt lets new input steer Codex during model responses (v0.159.0)
Upgrading from rust-v0.151.0? See every change through rust-v0.159.3.
- rust-v0.159.3 (September 30, 2026) — OpenAI Codex CLI rust-v0.159.3 now helps you stay secure with optional reminders to complete account security setup for local sessions. See what else
- rust-v0.159.2 (September 29, 2026) — OpenAI Codex CLI rust-v0.159.2 eliminates annoying console window flashing on Windows when launching background processes, making your workflow smooth
- rust-v0.159.1 (September 29, 2026) — OpenAI Codex CLI rust-v0.159.1 now defaults to GPT-6.1 Sol, a more powerful model that works across all your catalogs including Amazon Bedrock. This u
- rust-v0.159.0 (September 29, 2026) — OpenAI Codex CLI rust-v0.159.0 now lets you interrupt and redirect responses in real-time, plus adds a cleaner interface with helpful tips as you work
- rust-v0.158.0 (September 28, 2026) — OpenAI Codex CLI rust-v0.158.0 now lets you configure how text selection works in fullscreen mode and seamlessly connect to secure OAuth servers with
- rust-v0.157.1 (September 26, 2026) — OpenAI Codex CLI rust-v0.157.1 is now available with under-the-hood improvements to keep your coding experience smooth and reliable. Check out the ful
- rust-v0.157.0 (September 25, 2026) — The OpenAI Codex CLI rust-v0.157.0 now supports GPT-6 Sol and Luna models with Amazon Bedrock integration, making it easier to upgrade from older vers
- rust-v0.156.1 (September 23, 2026) — OpenAI Codex CLI rust-v0.156.1 now lets you choose between two powerful new models, GPT-6 Sol and Luna, with smarter recommendations for your coding w
- rust-v0.156.0 (September 22, 2026) — The OpenAI Codex CLI rust-v0.156.0 brings voice conversations on by default with an easy toggle, plus a beautiful fullscreen UI option that lets you s
- rust-v0.155.1 (September 18, 2026) — OpenAI Codex CLI rust-v0.155.1 fixes a critical issue where new local TUI sessions were incorrectly enabling reasoning summaries, causing rejections f
- rust-v0.155.0 (September 17, 2026) — OpenAI Codex CLI rust-v0.155.0 brings voice conversations with live transcripts and real-time reasoning summaries to your workflow, while improving re
- python-v0.154.0 (September 10, 2026) — OpenAI Codex CLI python-v0.154.0 now supports advanced reasoning modes and lets external systems contribute content directly to conversations with ful
- rust-v0.154.0 (September 9, 2026) — OpenAI Codex CLI rust-v0.154.0 brings GPT-6-Astra support and experimental worktree isolation for managing separate code checkouts effortlessly. Answe
- rust-v0.153.4 (September 4, 2026) — OpenAI Codex CLI rust-v0.153.4 now makes Astra easier to find and use as your default model. We've also fixed how guidance works so it only suggests a
- rust-v0.153.3 (September 4, 2026) — OpenAI Codex CLI rust-v0.153.3 now supports GPT-6-Astra through Amazon Bedrock, giving you access to a powerful new model option. We've also fixed how
- rust-v0.153.2 (September 3, 2026) — OpenAI Codex CLI rust-v0.153.2 now displays the correct speed boost for the GPT-6-Astra Fast tier, clarifying it delivers 2x faster performance with i
- rust-v0.153.1 (September 3, 2026) — OpenAI Codex CLI rust-v0.153.1 now lets you configure GPT-6-Astra through the API without affecting your default settings. This streamlined approach g
- rust-v0.153.0 (September 3, 2026) — OpenAI Codex CLI rust-v0.153.0 now gives you full undo and redo in Vim mode while preserving your work, plus better control over automatic recaps and
- rust-v0.152.1 (September 1, 2026) — OpenAI Codex CLI rust-v0.152.1 fixes a critical issue where Node REPL policies weren't being properly recognized during guardian approval reviews. Thi
- rust-v0.152.0 (September 1, 2026) — OpenAI Codex CLI rust-v0.152.0 adds powerful Vim search capabilities and smarter rate-limit management to help you stay in control of your usage and c