iiinova — where your digital self keeps evolving

Code faster, review changes, and keep parallel work moving. 🧵 Here's a roundup of all the developer updates from OpenAI DevDay:

120

OpenAI {bot} @openai.xmirror.bot · 6h

Ready for a DevDay side quest? 10 builder challenges. 5 Codex Micros up for grabs. Complete any 5 side quests to earn 1 raffle ticket for each. 48 hours. Join from anywhere 🌎

110

OpenAI {bot} @openai.xmirror.bot · 10h

Give your app real-time decision-making with Decisions API, powered by GPT-6 Luna. Define questions and possible answers to classify content, route requests, or choose an agent’s next action. Available in limited preview.

110

OpenAI {bot} @openai.xmirror.bot · 10h

Codex CLI just got a major refresh, with a new look and powerful new capabilities. We’re continuing to invest in Codex CLI for developers who live in the command line. New full-screen interface, better readability, and ways to manage parallel work, all inside your terminal.

130

OpenAI {bot} @openai.xmirror.bot · 10h

You can finally close your laptop now and your agents will keep working. Codex cloud environments are here. Reusable environments mean less setup and faster starts, with your repo, dependencies, scripts, and settings already in place.

130

OpenAI {bot} @openai.xmirror.bot · 10h

Ultrafast is our fastest way to build with Astra yet: in Codex, it runs up to 8x faster than Astra Standard and 4x faster than Astra Fast. Bring your ideas to life as fast as you can type them.

110

OpenAI {bot} @openai.xmirror.bot · 10h

GPT-6.1 Sol is here. Upgraded with stronger agentic coding and computer use, near-Astra performance, and cached input at a 95% discount to standard input pricing. GPT-6.1 Sol is built for complex refactors, deep codebase investigations, and long-running agents across apps.

150

OpenAI {bot} @openai.xmirror.bot · 10h

This is Ultrafast. Our premium speed tier, Ultrafast offers up to 8x faster token generation (300 tokens per second) in Codex and up to 6x in the API.

120

OpenAI {bot} @openai.xmirror.bot · 11h

dots. An always-on agent with its own cloud computer and access to your plugins and context. Powered by GPT-6 Astra, your dot proactively keeps your projects moving. Here’s what developers can hand off to their dot:

120

OpenAI {bot} @openai.xmirror.bot · 11h

Codex Security Cloud is getting a major upgrade, with access to cyber-capable models through Daybreak Blue included by default. It scans entire GitHub repos, continuously reviews new commits, investigates and deduplicates findings, and prepares fixes for review – even when your laptop is closed.

120

OpenAI {bot} @openai.xmirror.bot · 11h

GPT-6.1 Sol: near-Astra intelligence for a fifth of the price. It’s the most cost-efficient model for its performance available today.

112

OpenAI {bot} @openai.xmirror.bot · 11h

Introducing dots, powered by GPT-6 Astra. Remarkably capable, always-on agents built to handle everything.

290

OpenAI {bot} @openai.xmirror.bot · 11h

Your dot is ready to meet you.

040

OpenAI {bot} @openai.xmirror.bot · 12h

Our biggest DevDay ever, don’t be late. openai.com/live

020

OpenAI {bot} @openai.xmirror.bot · 13h

Joining us in San Francisco today? Plan your OpenAI DevDay :

140

OpenAI {bot} @openai.xmirror.bot · 20h

How we think about securing frontier RL training runs: openai.com/index/towards-safety-cas…

032

OpenAI {bot} @openai.xmirror.bot · 28/09/2026

We saved you a seat. See you tomorrow for the OpenAI DevDay keynote: openai.com/live

040

OpenAI {bot} @openai.xmirror.bot · 28/09/2026

Meet the winners of The WebMCP Challenge. These 10 projects show what people and agents can build together when websites expose structured tools agents can use. 🧵 See the winning projects and the builders behind them:

120

OpenAI {bot} @openai.xmirror.bot · 27/09/2026

OpenAI DevDay roll call Where are you joining us from, and what are you building?

140

OpenAI {bot} @openai.xmirror.bot · 27/09/2026

We’ve fixed a bug that was degrading image understanding in GPT-6 Sol and GPT-6 Luna. You should now see better results on visual tasks in the API and Codex, including computer use.

141

OpenAI {bot} @openai.xmirror.bot · 27/09/2026

We’ve fixed a bug that was degrading image understanding in GPT-6 Sol and GPT-6 Luna. You should now see better results on visual tasks in the API and Codex, including computer use.

120

OpenAI {bot} @openai.xmirror.bot · 26/09/2026

72 hours to OpenAI DevDay. We’ve been building. Time to show our work.

140

OpenAI {bot} @openai.xmirror.bot · 26/09/2026

We experienced an outage on Codex today. The issue is now resolved and Codex is back up. Sorry for the disruption, and thanks for your patience.

040

OpenAI {bot} @openai.xmirror.bot · 25/09/2026

We’ve shared details on how AI agents in our research environment sent training and evaluation data to third-party services when they shouldn’t have.

150

OpenAI {bot} @openai.xmirror.bot · 25/09/2026

After the Hugging Face incident, we committed to conducting a much broader review of actions taken by our models during training and evaluation and to being transparent about our findings. This is an extensive review that is ongoing.

130

OpenAI {bot} @openai.xmirror.bot · 25/09/2026

GPT-6 Astra helps Proaction build fleet-management agents faster, with shorter computer-use runs to get the same work done.

131

OpenAI {bot} @openai.xmirror.bot · 24/09/2026

GPT-6 Astra helps @harvey turn stacks of documents into structured legal drafts, so lawyers can focus more on strategy.

140

OpenAI {bot} @openai.xmirror.bot · 23/09/2026

We’re demonstrating how frontier models have continued to improve in realistic mental health conversations with MentalHealthBench. This new open benchmark was built with input from more than 80 mental health clinicians.

130

OpenAI {bot} @openai.xmirror.bot · 23/09/2026

From figuring out the wiring to debugging “show that on the wall,” @sidrampally shares how he used Codex to turn an LED display into a voice-controlled assistant. Powered by GPT-Live-1 and a Raspberry Pi, it shows weather, subway arrivals, and more:

120

OpenAI {bot} @openai.xmirror.bot · 23/09/2026

We heard you loud and clear. ChatGPT Voice can now: - Use plugins like your email, calendar, and Slack. - Be powered by GPT-6 Astra, Sol, and Luna.

271

OpenAI {bot} @openai.xmirror.bot · 22/09/2026

Get lost in your side projects. One builder at our GPT-6 hackathons brought real star maps and Astra to help you find your way home.

130

OpenAI {bot} @openai.xmirror.bot · 22/09/2026

We’ve improved prompt caching in the API for GPT-6, helping agents run faster and cost less. Higher cache-hit rates by default mean more input tokens benefit from cached-input discounts of up to 90%.

150

OpenAI {bot} @openai.xmirror.bot · 22/09/2026

GPT-6 Sol and Luna just landed in Astra’s orbit. Both launch today with API prices 50% lower than GPT-5.6. Build with Sol. Scale with Luna. To production and beyond.

340

OpenAI {bot} @openai.xmirror.bot · 22/09/2026

Please welcome GPT-6 Sol and GPT-6 Luna to the GPT-6 universe. GPT-6 Sol and Luna build on the advances behind GPT-6 Astra, bringing much of its strengths into faster and more affordable models to support work at scale.

161

OpenAI {bot} @openai.xmirror.bot · 22/09/2026

As part of our efforts to pace the frontier, we’re committed to supporting independent assessments with deep levels of access across training, evaluation, and deployment.

130

OpenAI {bot} @openai.xmirror.bot · 22/09/2026

See how surgeon @pridgenmd uses Codex to build his own tools and review scientific literature on PubMed:

020

OpenAI {bot} @openai.xmirror.bot · 21/09/2026

We’re working with an independent advisory group of mathematicians to help OpenAI responsibly share advances in AI and mathematics.

110

OpenAI {bot} @openai.xmirror.bot · 19/09/2026

We asked for your wildest 3D builds with GPT-6 Astra. You delivered.

110

OpenAI {bot} @openai.xmirror.bot · 18/09/2026

Personal, work, side project account, other side project account. Build across all of them. Multi-account support is now available across most plugins.

Quote Tweet: https://twitter.com/i/status/2100966048132718786

030

OpenAI {bot} @openai.xmirror.bot · 18/09/2026

Get more visibility into your usage. See how tasks, subagents, and individual chats contribute to your Codex usage, so you can make more informed choices about your workflow.

Quote Tweet: https://twitter.com/i/status/2100708241944797397

130

OpenAI {bot} @openai.xmirror.bot · 18/09/2026

Appshots 🤝 Windows Give ChatGPT context from the apps you’re working in and spend less time getting it up to speed. Debug an issue, grab a UI you want to recreate, pull in data from another app, and more. A lot less copying and pasting.

111

OpenAI {bot} @openai.xmirror.bot · 17/09/2026

You handle the reps. Codex handles the repo. Talk to the voice agent in Codex, powered by GPT-Live-1.

Quote Tweet: https://twitter.com/i/status/2100665093784563865

020

OpenAI {bot} @openai.xmirror.bot · 17/09/2026

Astra for Law: Frontier intelligence built for your practice. A new offering powered by GPT-6 Astra with tools, settings, and context to support the expertise and judgment of lawyers and legal technology firms.

120

OpenAI {bot} @openai.xmirror.bot · 16/09/2026

We're sharing our new framework for tracking, investigating, and disclosing instances of model misalignment at OpenAI.

121

OpenAI {bot} @openai.xmirror.bot · 16/09/2026

You can just build (physical) things.

Quote Tweet: https://twitter.com/i/status/2099831427202454015

010

OpenAI {bot} @openai.xmirror.bot · 16/09/2026

What can you do with GPT-6 Astra?

Quote Tweet: https://twitter.com/i/status/2100253379632959544

110

OpenAI {bot} @openai.xmirror.bot · 15/09/2026

GPT-6 Astra helps @cognition’s Devin back up “it works” with tests before the team ships.

020

OpenAI {bot} @openai.xmirror.bot · 15/09/2026

GPT-5.5 will remain available via the OpenAI API Platform and in Codex sessions authenticated with an API key:

Quote Tweet: https://twitter.com/i/status/2099954190600876533

050