Planning Work with GPT-6 Astra in Codex

Melvin Vivas · X post · 2026-09-09 · Open on X

Topics: AI Dev Tools & Productivity · Level: beginner

Summary

A quick first impression of using the GPT-6 Astra model to plan in OpenAI Codex. The creator says it asked clarifying questions, suggested libraries, and produced a very complete plan before any code was written.

Key points

• Ask the model to plan in Codex before it writes any code.
• Astra asked clarifying questions before committing to a plan.
• It suggested specific libraries to use for the task.
• The creator rated the resulting plan as very comprehensive.

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
• GPT-6 Astra · tool · openai.com · paid
  The model announced in the quoted launch post, pitched as the developer's most capable model for work, coding, science and cybersecurity, and able to operate a computer.
  Also in: Customizing Your Coding Setup with Pi Coding Agent Extensions (Melvin Vivas on X · notes), Pi Agent Council: Ask Multiple LLMs in Parallel and Compare Their Advice (Melvin Vivas on X · notes), Use GPT-6.1 Sol by Default, Save Astra for Emergencies (Melvin Vivas on X · notes), Dots in ChatGPT: always-on AI agents that you hand responsibilities to (Melvin Vivas on X · notes) and 49 more

Try this

• Try asking Astra to make a plan in Codex before you start coding.