ChatGPT 5.6 + Codex Tested: Websites, Computer Use, Plugins & the Pet

Key Takeaways

• Codex is now the ChatGPT app. Goldie points out that what was "Codex" has been rebranded and absorbed into ChatGPT — a single "super app" with a Fast/Smart toggle and adjustable effort (he bumps a website build to "extra high" for better output). A 1.5x speed setting moves ~50% faster but burns more tokens.
• Website builds from an existing site. Using the dedicated Sites → Create flow, he feeds in his current site and gets a redesigned version back — the new build (GPT-5.6) looks more modern and "less like AI" than an older Opus 4.8-generated version, with working FAQ accordions, CTAs, effects, and an embedded video.
• Background computer use that actually finished the job. Prefixing a task with @computer lets Codex drive the browser itself — it navigated to a Skool group and published a post about using Codex with GPT-5.6, asking for confirmation before publishing. Goldie notes this is a task he'd previously failed to get Claude to complete; here it worked and personalized the copy to his SEO niche.
• Plugins extend the agent. He links a Descript plugin so the agent can find his latest video and edit it (stripping filler words, then adding zooms/animations), and references Remotion — a free skill that teaches agents to generate video. There's a broad plugin catalog for connecting other apps and tools.
• Installing an agent from GitHub. He points Codex at a Hermes Agent GitHub repo and asks it to install and log in — with the reminder to always start each project in its own new folder rather than reusing an active task's folder.
• The "pet" task tracker. Toggled from the bottom-left profile, the pet shows live previews of background tasks so you can juggle multiple builds at once — though he hits quirks (it appears to show at most two conversations, and long-running tasks can run slowly).
• Images and models: designs are generated with ChatGPT Image 2.0, and he rates GPT-5.6 "Soul" as the best model to use inside the app — impressive at building apps and games, "not quite Fable 5 level" but close.

Commands & Code Mentioned

# Trigger background computer use inside the ChatGPT/Codex app:
@computer check out [link] and post about how to use Codex with GPT-5.6

# Best practice: start every project in its own folder
New task → New project → Use an existing / new folder