Tactics to Stretch Your Weekly Codex Usage Limit

Melvin Vivas · X post · 2026-08-20 · Open on X

Topics: AI Dev Tools & Productivity · Level: beginner

Summary

After his Codex limit reset, the creator lists rules for making the weekly quota last. They cover choosing cheaper models by default, limiting /goal runs, supervising Codex while it works, and doing planning in plain ChatGPT.

Key points

• Use the lighter Luna model by default and save Sol for very complex tasks.
• Avoid /goal; if you do use it, keep the scope small and run it with Luna.
• Stay at your computer while Codex runs so you can stop it if it burns too much quota.
• Do planning in ChatGPT when the task doesn't need your codebase as context yet.

Resources mentioned

• OpenAI Codex · tool · openai.com · paid
  OpenAI's coding agent. In the diagram it writes code, fixes review findings and drives the build loop. The creator also used it to make this video.
  Also in: An agent bot that installs and drives Codex on its own (Melvin Vivas on X · notes), Asking a Coder bot to install Codex (Melvin Vivas on X · notes), Sign in with ChatGPT: Setting Usage Limits for Each App (Melvin Vivas on X · notes), Codex Cloud Environments Must Be Saved & Published Before Use (Melvin Vivas on X · notes) and 240 more
• ChatGPT · tool · chatgpt.com · free · recommended by both Bashiri Smith & Melvin Vivas
  OpenAI's AI assistant (web, desktop and mobile apps), used for chat, coding, writing and image generation.
  Also in: Sign in with ChatGPT: Setting Usage Limits for Each App (Melvin Vivas on X · notes), Dots Demo: A Voice AI Agent Handling Travel Booking and Feedback Triage (Melvin Vivas on X · notes), ChatGPT Can Commit Code Directly to Your GitHub Repo (Melvin Vivas on X · notes), OpenAI Dots: Agents Inside ChatGPT That Debug, Fix, and Open PRs (Melvin Vivas on X · notes) and 23 more

Try this

• Make a lighter model your default and only switch to the heavy model for complex tasks.
• Keep /goal tasks small, or avoid them.
• Watch Codex runs and stop them if they use too much.
• Plan in ChatGPT before moving to Codex.