Codex /goal usage limits on ChatGPT Plus

Melvin Vivas · X post · 2026-05-11 · Open on X

Topics: AI Dev Tools & Productivity, AI Agents, Tool Use & MCP · Level: intermediate

Summary

A real-world data point on usage limits: 1 hour 22 minutes of running /goal in Codex used up the 5-hour usage limit on the ChatGPT Plus plan. This helps you estimate how much autonomous agent time a Plus subscription gives you.

Key points

• Codex's /goal command runs long autonomous coding tasks toward a goal.
• 1h22m of /goal hit the ChatGPT Plus 5-hour usage limit.
• Long agent runs use up plan limits quickly, so budget for them or consider a higher tier.

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 Plus · tool · openai.com · paid
  OpenAI's paid ChatGPT subscription, which includes Codex usage with a 5-hour limit window.