Use GPT-6.1 Sol by Default, Save Astra for Emergencies

Melvin Vivas · X post · 2026-09-30 · Open on X

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

Summary

A model-selection tip: GPT-6.1 Sol is capable enough for everyday use, so save Astra for emergencies only. In other words, use the cheaper capable model by default and escalate only when you need to.

Key points

• GPT-6.1 Sol is very capable for most work.
• Save Astra for emergencies or hard problems.
• General pattern: route most tasks to the efficient model and escalate only when needed.

Resources mentioned

• GPT-6.1 Sol · tool · openai.com · paid
  A new OpenAI model announced at DevDay 2026 (name as written in the machine transcript), offered with Fast and Ultra fast speed tiers.
  Also in: JevDev: Open-Source UI Tool for Experimenting with Jev (Typesafe.ai) (Melvin Vivas on X · notes), Comparing Coding Models on the Same Task in Devin iOS (Melvin Vivas on X · notes), 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) and 9 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), Dots in ChatGPT: always-on AI agents that you hand responsibilities to (Melvin Vivas on X · notes), OpenAI DevDay recap: Dots, GPT-6.1 Sol, Codex Cloud, Agents API (Melvin Vivas on X · notes) and 49 more

Try this

• Use GPT-6.1 Sol by default and switch to Astra only for emergencies.