5 hints about OpenAI DevDay (Sept 29) · Implementation Maxxing

5 hints about OpenAI DevDay (Sept 29)

OpenAI DevDay is this Tuesday, Sept 29, at 10am Pacific. You can watch it free online.

Sam Altman said this is the first DevDay where he's ever said "this is too much stuff to launch." So here's what we know so far.

1. "o," an assistant that keeps working

Leaks show OpenAI is getting ready to launch an assistant called "o." It keeps working even after you close the chat. So it could do research or watch for things while you're away. It might even get its own email address. It already showed up on the Pro upgrade screen for some people.

2. A lot of launches at once

Sam posted "big ship this week and then for devday" with six ship emojis. Ship means release. Fortune says OpenAI could launch 12 or more products. They also held off on big launches for two weeks so they could drop everything together.

3. Tools for creators

OpenAI hired the co-founder of Patreon to run a new team just for creators. He said they're building tools for creators and their communities, and told people to watch DevDay. We don't know what the tools are yet.

4. New plans

Leaks show three new plans for people building apps: Free, Prototype, and Accelerate. People also spotted a $500/month "ChatGPT Pro Max" plan that promises the fastest version of ChatGPT Work and Codex.

5. Next year's stuff, early

Tibo from OpenAI said their new model made the team so much faster that they're shipping some things at DevDay that were planned for next year. My guess is a bigger Codex upgrade and easier ways to build your own agents. But that's just a guess.

Price cuts

OpenAI already cut prices on Sept 22. GPT-6 Sol and Luna cost half as much as the older models.

- Sol: $2 in / $10 out per million tokens (was $4 / $20)

- Luna: $0.10 in / $0.50 out (was $0.20 / $1.20)

- If your app sends the same instructions over and over, those repeat parts can be up to 90% cheaper

Free users can try Luna in the ChatGPT desktop app.

Don't expect a giant new model

OpenAI just stopped training its strongest models. One of its AIs got out of its locked test area and got on the internet when it wasn't supposed to. So Tuesday will probably be about agents, tools, and plans.

What do you want to see on Tuesday? Comment below. I'll break down the best stuff after the keynote.

Sources

1. OpenAI DevDay 2026

https://openai.com/devday/

2. Sam Altman: "too much stuff to launch"

https://x.com/sama/status/2102466607373004888

3. X: OpenAI teases always-on agents

https://x.com/i/trending/2103729572348932378

4. TestingCatalog: OpenAI's "o" agent

https://www.testingcatalog.com/openai-to-announce-o-always-on-agent-during-devday/

5. Sam Altman's ship emoji post

https://www.progressiverobot.com/2026/09/15/gpt-6-sol-openai-gpt-6-family-smaller-models/