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Matthew Berman
You aren't using Codex like me...
⏱ 16 min video · 3 min read14 Jul 2026Worth watching
TL;DR
Matthew Berman shares advanced Codex tips covering model selection within the GPT-5.6 family, thread delegation, browser automation, loops/goals, mobile control, and critical safety hooks. The video is aimed at both beginners and power users who want to extract more value from Codex.
Key points
1
For GPT-5.6 model selection: use Soul for hardest problems, skip Terra (poor value), and use Luna Max for easier tasks — Luna Max outperforms Terra High at lower cost
2
Codex threads can see each other, enabling a master thread to spin up and babysit parallel worker threads with different models and thinking budgets
3
The Codex browser now supports cookie and password import and can handle complex real-world tasks like changing DNS records and auto-scaling Supabase instances
4
Loops (called Goals in Codex) let you set a target outcome and let the agent iterate autonomously for hours or days — e.g. run a benchmark, fix failures, repeat until 90% pass rate
5
Safety hooks are essential: configure pre-tool-use hooks to block catastrophic file deletions, and use Approve For Me mode instead of full unrestricted access
Actionable insights
→
Audit your agents.md file after every major model release — rules written for older models may be stale or counterproductive, and that file is loaded into every agent context window
→
Set up lifecycle hooks in Codex settings to block dangerous shell commands (rm -rf /, deleting home directory) before they execute — copy the prompt from the GitHub gist linked in the video
→
Install Matt Pocock's TypeScript skills skill into Codex to get a curated set of coding best practices loaded automatically into your agent
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Use the Zapier MCP plugin to connect Codex to 9,000+ apps including Gmail, Trello, Asana, and Google Docs without custom integration work
→
Control your desktop Codex remotely from your phone by enabling the connection in Settings > Connections > Control This Mac and scanning the QR code from the Codex mobile app
Notable quotes
“I foresee the Codex browser and the Claude Code browser becoming my daily driver browsers by the end of this year, if not sooner.”
“Sometimes this runs for up to 12 hours straight, just consistently improving over time.”
“You can control your Codex on your computer from your mobile device anywhere in the world — and I think surprisingly few people know about this.”
Worth watching?
✅
Worth watching the full video?
Worth watching if you use Codex regularly — the thread delegation, safety hooks, and loop/goal patterns are genuinely advanced techniques that most users miss, though the key details are all captured here if you prefer to read.
Saved you some time? The creator still deserves a like.
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