Creator's favorite OpenAI DevDay announcements

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

Topics: Industry Trends & Job Market, AI Agents, Tool Use & MCP, AI Dev Tools & Productivity · Level: beginner

Summary

The creator picks his favorite OpenAI DevDay announcements: Dots, Codex Cloud, GPT-6.1 Sol, the Decisions API, the Agents API, OpenAI Marketplace and the banked Codex usage reset. It works as a short list of which launches to look into first.

Key points

• Favorites: Dots, Codex Cloud, GPT-6.1 Sol, Decisions API, Agents API, OpenAI Marketplace
• The 'banked reset' of Codex usage limits is also called out
• Follow @OpenAI on X for official announcements

Resources mentioned

• OpenAI · tool · x.com · free
  An AI model provider whose models can be used through managed connectors.
  Also in: OpenAI Agents API with Bring Your Own Sandbox as a backend for a 'software factory' (Melvin Vivas on X · notes), Building Software Factories on the OpenAI Agents API (Codex-Powered) (Melvin Vivas on X · notes), Coworker: Free Local-First Desktop App for Running AI Agents (Melvin Vivas on X · notes), OpenAI Models Leaving Cursor After November 12 (Melvin Vivas on X · notes) and 11 more
• OpenAI Dots · tool · openai.com · paid
  Always-on agents in ChatGPT, each with its own cloud computer and browser, that take on ongoing work and personal responsibilities.
  Also in: Dots Demo: A Voice AI Agent Handling Travel Booking and Feedback Triage (Melvin Vivas on X · notes), OpenAI Dots: Agents Inside ChatGPT That Debug, Fix, and Open PRs (Melvin Vivas on X · notes), Dots in ChatGPT: always-on AI agents that you hand responsibilities to (Melvin Vivas on X · notes), OpenAI DevDay 2026 Recap: Dots, Agents API, Codex Cloud & Marketplace (Melvin Vivas on X · notes) and 1 more
• Codex Cloud · tool · learn.chatgpt.com · paid
  OpenAI's cloud-run version of Codex, so coding tasks keep running remotely.
  Also in: OpenAI DevDay recap: Dots, GPT-6.1 Sol, Codex Cloud, Agents API (Melvin Vivas on X · notes), OpenAI DevDay 2026 Replay: Timestamped Guide to the Announcements (Melvin Vivas on X · notes)
• 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
• OpenAI Decisions API · tool · openai.com · paid
  A new OpenAI API, shown as a preview, that lets the model respond and make decisions.
  Also in: OpenAI DevDay 2026 Recap: Dots, Agents API, Codex Cloud & Marketplace (Melvin Vivas on X · notes), OpenAI DevDay recap: Dots, GPT-6.1 Sol, Codex Cloud, Agents API (Melvin Vivas on X · notes), OpenAI DevDay 2026 Replay: Timestamped Guide to the Announcements (Melvin Vivas on X · notes)
• OpenAI Agents API · tool · developers.openai.com · paid
  OpenAI's managed API for building and running cloud agents on a hosted Codex harness, with orchestration, sessions and context management built in.
  Also in: OpenAI DevDay 2026 Recap: Dots, Agents API, Codex Cloud & Marketplace (Melvin Vivas on X · notes), OpenAI DevDay recap: Dots, GPT-6.1 Sol, Codex Cloud, Agents API (Melvin Vivas on X · notes), OpenAI DevDay 2026 Replay: Timestamped Guide to the Announcements (Melvin Vivas on X · notes), Building Software Factories on the OpenAI Agents API (Codex-Powered) (Melvin Vivas on X · notes) and 1 more
• OpenAI Marketplace · website · openai.com · paid
  OpenAI's new marketplace where developers sell products and enterprises can pay with their OpenAI commitment.
  Also in: OpenAI DevDay 2026 Recap: Dots, Agents API, Codex Cloud & Marketplace (Melvin Vivas on X · notes), OpenAI DevDay recap: Dots, GPT-6.1 Sol, Codex Cloud, Agents API (Melvin Vivas on X · notes), OpenAI DevDay 2026 Replay: Timestamped Guide to the Announcements (Melvin Vivas on X · notes)