Model Choice vs. Usage Limits: Astra Burns Codex Pro Quota Fast

Melvin Vivas · X post · 2026-09-08 · Open on X

Topics: AI Dev Tools & Productivity, LLM Fundamentals · Level: intermediate

Summary

After subscribing to Codex Pro, the creator agrees with other users that the Astra model uses up usage limits quickly, even on the Pro plan. This raises the question of who such an expensive model is really for.

Key points

• Expensive frontier models can use up a subscription's limits quickly, even on Pro plans.
• Weigh a model's capability against how fast it uses your quota before making it your default.
• Consider saving the most expensive model for specific roles, such as orchestration or review, rather than every task.

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