Codex Plus tip: avoid Astra to save your usage limits
Melvin Vivas · X post · 2026-09-20 · Open on X
Topics: AI Dev Tools & Productivity, LLM Fundamentals · Level: beginner
Summary
Practical tip for Codex Plus users: the Astra model uses up plan limits faster. Save Astra for exceptional queries and use Luna and Sol for everyday work.
Key points
- On the Codex Plus plan, Astra burns through usage limits faster.
- Save Astra for exceptional, hard queries only.
- Use Luna and Sol for everyday tasks.
- General principle: send each task to the cheapest model that can handle it.
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
Try this
- On Codex Plus, use Luna or Sol by default and switch to Astra only for exceptional queries.
More in AI Dev Tools & Productivity
- Livestream Recap: Codex Limits and Why Devin Is a $200 Option
- Choosing a $200 Coding Plan: Codex vs Devin vs Cursor vs Claude
- SWE-2 free in Devin cloud agents until October 8
- Devin Supports Multiple Models, Including Open Models, to Save on Limits
- Devin SWE-2 Max Builds an iOS App Running Gemma 4 E2B On-Device
- Using Devin SWE-2 Max to Build an iOS App Running Gemma 4 E2B On-Device