OpenAI Developers

@OpenAIDevs on X

Writes about AI and Engineering. 79% of posts open with an observation. A typical post reaches 2,336 likes.

Remix their style

Posts: 28
Likes: 68K
Typical: 2.3K
Best: 6.8K

What they write about

AI: 89%
Engineering: 46%

How they open

observation: 79%
announcement: 11%
number: 4%

Every post of theirs in the library

OpenAI Developers@OpenAIDevs

ChatGPT 🤝 VS Code, Xcode, Terminal, iTerm2 ChatGPT for macOS can now work with apps on your desktop. In this early beta for Plus and Team users, you can let ChatGPT look at coding apps to provide better answers.

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OpenAI Developers@OpenAIDevs

GPT-5.4 is here. Native computer-use capabilities. Up to 1M tokens of context in Codex and the API. Best-in-class agentic coding for complex tasks. Scalable tool search across larger ecosystems. More efficient reasoning for long, tool-heavy workflows. t.co

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OpenAI Developers@OpenAIDevs

GPT-5.5 is here. It’s our smartest frontier model yet, introducing a new class of intelligence for agentic coding, computer use, knowledge work, and scientific research. Rolling out in ChatGPT and Codex today. API is coming soon.

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OpenAI Developers@OpenAIDevs

We’re excited to launch the Codex app, a command center for building with agents. It gives you a focused space to manage multiple agents at once, run work in parallel, and collaborate with agents over long-running tasks. t.co

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OpenAI Developers@OpenAIDevs

Introducing GPT-5.3-Codex-Spark, our ultra-fast model purpose built for real-time coding. We’re rolling it out as a research preview for ChatGPT Pro users in the Codex app, Codex CLI, and IDE extension.

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OpenAI Developers@OpenAIDevs

Last week, we released a preview of memories in Codex. Today, we’re expanding the experiment with Chronicle, which improves memories using recent screen context. Now, Codex can help with what you’ve been working on without you restating context.

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OpenAI Developers@OpenAIDevs

📣 What if every open issue had a Codex agent? That’s the idea behind Symphony, an open-source agent orchestrator for Codex that turns task trackers into always-on systems for agentic work, letting humans focus on review and direction.

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OpenAI Developers@OpenAIDevs

We’re bringing Codex and ChatGPT together in one desktop app. The same powerful coding agent, now alongside ChatGPT Work, with new coding workflows, a new Chrome extension, revamped in-app browser, and faster Computer Use powered by GPT-5.6. t.co

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OpenAI Developers@OpenAIDevs

MCP 🤝 OpenAI Agents SDK You can now connect your Model Context Protocol servers to Agents: t.co We’re also working on MCP support for the OpenAI API and ChatGPT desktop app—we’ll share some more news in the coming months.

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OpenAI Developers@OpenAIDevs

Three new state-of-the-art audio models in the API: 🗣️ Two speech-to-text models—outperforming Whisper 💬 A new TTS model—you can instruct it *how* to speak 🤖 And the Agents SDK now supports audio, making it easy to build voice agents. Try TTS now at t.co

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OpenAI Developers@OpenAIDevs

Meet GPT-5.1-Codex-Max, our latest frontier agentic coding model, available in Codex starting today. It’s faster, more capable and token-efficient, and able to work persistently on long tasks with built-in compaction abilities.

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OpenAI Developers@OpenAIDevs

OpenAI o3-mini is now available in the API for developers on tiers 3–5. It comes with a raft of developer features: ⚙️ Function calling 📝 Developer messages 🗂️ Structured Outputs 🧠 Reasoning effort 🌊 Streaming 📦 Batch API support 🤖 Assistants API support

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OpenAI Developers@OpenAIDevs

Build long-running agents with more control over agent execution. New capabilities in the Agents SDK: • Run agents in controlled sandboxes • Inspect and customize the open-source harness • Control when memories are created and where they’re stored

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OpenAI Developers@OpenAIDevs

Announcing GPT-4.1, GPT-4.1 mini, and GPT-4.1 nano in the API. TL;DR: Major improvements on coding, instruction following, and long context. 💥 00:00 Intro 02:18 Coding 04:53 Instruction following 06:58 Long context 10:22 Demos, pricing, and availability 20:00 @windsurf_ai

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OpenAI Developers@OpenAIDevs

GPT-4 Turbo with Vision is now generally available in the API. Vision requests can now also use JSON mode and function calling. t.co Below are some great ways developers are building with vision. Drop yours in a reply 🧵

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OpenAI Developers@OpenAIDevs

Codex is now available in Xcode 26.3 Work through complex tasks with more autonomy by breaking down tasks, searching Apple docs, exploring file structures, updating settings, and capturing Previews as you iterate Available in the Xcode 26.3 release candidate

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OpenAI Developers@OpenAIDevs

GPT-5.4 can write Playwright code, read screenshots, and issue keyboard/mouse actions to operate computers. You can steer its behavior and set custom confirmation policies for different risk tolerances. On OSWorld-Verified, it achieves a state-of-the-art 75.0% success rate.

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OpenAI Developers@OpenAIDevs

We're bringing OpenAI o1 to the API. We're rolling out access to developers on usage tier 5 starting today, and rollout will continue over the next few weeks. o1 supports: ⚙️ Function calling 🗂️ Structured Outputs 👀 Vision 📝 Developer messages 🧠 Reasoning effort

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OpenAI Developers@OpenAIDevs

GPT-5.3-Codex is our first model that was instrumental in creating itself. The Codex team used early versions to debug training, manage deployment, and diagnose test results and evaluations, accelerating its own development.

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OpenAI Developers@OpenAIDevs

Codex now generates higher-quality spreadsheets, slide decks, and documents with GPT-5.5 in @Microsoft Office and @googledrive . A new file viewer in the app makes it faster to review, revise, and iterate, so files are ready to share sooner.

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OpenAI Developers@OpenAIDevs

GPT-5.3-Codex-Spark is the first milestone in our partnership with @cerebras. It provides a faster tier on the same production stack as our other models, complementing GPUs for workloads where low latency is critical. t.co

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OpenAI Developers@OpenAIDevs

GPT-5.4 sets new state of the art results on professional work and computer use, with strong gains on coding and tool use. 83.0% on GDPval 75.0% on OSWorld-Verified 57.7% on SWE-Bench Pro (Public) 54.6% on Toolathlon

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OpenAI Developers@OpenAIDevs

New in the fine-tuning API: • Capture snapshots at every epoch, adjust hyperparameters, track metrics, and integrate with Weights & Biases • Compare model quality and performance side-by-side in the Playground Read more: t.co

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OpenAI Developers@OpenAIDevs

With the Codex app on Windows, now you can: • Work with multiple agents in parallel • Manage long-running tasks • Review diffs in one place • Stay in your existing setup, without switching to WSL or VMs

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OpenAI Developers@OpenAIDevs

GPT-5.4 mini is available today in the API, Codex, and ChatGPT. In the API, it has a 400k context window. In Codex, it uses only 30% of the GPT-5.4 quota, letting you handle simpler coding tasks for about one-third of the cost. GPT-5.4 nano is only available in the API.

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OpenAI Developers@OpenAIDevs

Chronicle runs background agents to build memories from screen captures. It uses rate limits quickly. Screen captures are stored temporarily on device to generate memories—also stored on device. You can inspect and edit memories. Be aware that other apps may access these files.

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OpenAI Developers@OpenAIDevs

It outperforms GPT-5.1-Codex on real-world engineering tasks and is the first Codex model trained to operate in Windows environments. It’s also better at using Powershell, making it a better collaborator on Windows machines.

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OpenAI Developers@OpenAIDevs

With this, we’re also rolling out Agent mode on Windows: Codex can read files, write files, and run commands in your working folder with fewer approvals. Agent mode uses a new experimental Windows sandbox to limit filesystem and network access. t.co

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