OpenAI’s mission is to ensure that artificial general intelligence benefits all of humanity. We’re hiring: https://t.co/dJGr6Lg202
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Jan 27 • 4 tweets • 2 min read
Introducing Prism, a free workspace for scientists to write and collaborate on research, powered by GPT-5.2.
Available today to anyone with a ChatGPT personal account: prism.openai.com
Prism offers unlimited projects and collaborators in a single, cloud-based, LaTeX-native workspace.
GPT-5.2 works inside your project with access to paper structure, equations, references, and surrounding context—right where the work happens.
Jan 16 • 4 tweets • 2 min read
In the coming weeks, we plan to start testing ads in ChatGPT free and Go tiers.
We’re sharing our principles early on how we’ll approach ads–guided by putting user trust and transparency first as we work to make AI accessible to everyone.
What matters most:
- Responses in ChatGPT will not be influenced by ads.
- Ads are always separate and clearly labeled.
- Your conversations are private from advertisers.
- Plus, Pro, Business, and Enterprise tiers will not have ads.
Here's an example of what the first ad formats we plan to test could look like.
Jan 7 • 6 tweets • 2 min read
Introducing ChatGPT Health — a dedicated space for health conversations in ChatGPT. You can securely connect medical records and wellness apps so responses are grounded in your own health information.
Designed to help you navigate medical care, not replace it.
Join the waitlist to get early access.
openai.com/index/introduc…
ChatGPT Health can help you navigate everyday questions and spot patterns over time, so you feel more informed, prepared, and confident for important medical conversations.
Dec 18, 2025 • 5 tweets • 2 min read
To preserve chain-of-thought (CoT) monitorability, we must be able to measure it.
We built a framework + evaluation suite to measure CoT monitorability — 13 evaluations across 24 environments — so that we can actually tell when models verbalize targeted aspects of their internal reasoning. openai.com/index/evaluati…
Monitoring a model’s chain-of-thought is far more effective than watching only its actions or final answers.
The more a model “thinks” (longer CoTs), the easier it is to spot issues.
Dec 16, 2025 • 7 tweets • 3 min read
Accelerating scientific progress is one of the most impactful ways AI can benefit society. Models can already help researchers reason through hard problems — but doing this well means testing models on tougher evaluations and in real scientific workflows grounded in experiments.
We’re releasing a new eval to measure expert-level scientific reasoning: FrontierScience.
This benchmark measures PhD-level scientific reasoning across physics, chemistry, and biology.
It contains hard, expert-written questions (both olympiad-style problems and longer research-style tasks) designed to reveal where models succeed and where they fall short. openai.com/index/frontier…
Dec 11, 2025 • 8 tweets • 2 min read
GPT-5.2 is now rolling out to everyone. openai.com/index/introduc…
GPT-5.2 Instant, Thinking, and Pro are rolling out today, starting with Plus, Pro, Business, and Enterprise plans. Free and Go users will get access tomorrow.
GPT-5.2 is also now in the API and Codex.
Nov 24, 2025 • 7 tweets • 2 min read
Introducing shopping research, a new experience in ChatGPT that does the research to help you find the right products.
It’s everything you like about deep research but with an interactive interface to help you make smarter purchasing decisions.
Shopping research asks smart clarifying questions, researches deeply across the internet, reviews quality sources, and builds on ChatGPT’s understanding of you from past conversations and memory to deliver a personalized buyer’s guide in minutes.
We’ve developed a new way to train small AI models with internal mechanisms that are easier for humans to understand.
Language models like the ones behind ChatGPT have complex, sometimes surprising structures, and we don’t yet fully understand how they work.
This approach helps us begin to close that gap. openai.com/index/understa…
Most neural networks today are dense and highly entangled, making it difficult to understand what each part is doing.
In our new research, we train “sparse” models—with fewer, simpler connections between neurons—to see whether their computations become easier to understand.
Nov 12, 2025 • 5 tweets • 2 min read
GPT-5.1 in ChatGPT is rolling out to all users this week.
It’s smarter, more reliable, and a lot more conversational.
Today we’re introducing GDPval, a new evaluation that measures AI on real-world, economically valuable tasks.
Evals ground progress in evidence instead of speculation and help track how AI improves at the kind of work that matters most. openai.com/index/gdpval-v0
GDPval spans 44 occupations selected from the top 9 sectors contributing to U.S. Gross Domestic Product (GDP).
Sep 17, 2025 • 7 tweets • 3 min read
Today we’re releasing research with @apolloaievals.
In controlled tests, we found behaviors consistent with scheming in frontier models—and tested a way to reduce it.
While we believe these behaviors aren’t causing serious harm today, this is a future risk we’re preparing for. openai.com/index/detectin…
Scheming = when an AI behaves one way on the surface while hiding its true goals.
Today’s deployed systems have little opportunity to scheme in ways that could cause serious harm. The most common failures are simple deceptions—like pretending to complete a task without doing it. We’ve studied and mitigated these issues and made meaningful improvements in GPT-5 over earlier models.
But as AIs take on more complex, long-term tasks with real-world impact, the potential for harmful scheming will grow—so our safeguards and testing must grow with it.
Aug 5, 2025 • 7 tweets • 3 min read
We released two open-weight reasoning models—gpt-oss-120b and gpt-oss-20b—under an Apache 2.0 license.
Developed with open-source community feedback, these models deliver meaningful advancements in both reasoning capabilities & safety.
openai.com/index/introduc…
gpt-oss-120b matches OpenAI o4-mini on core benchmarks and exceeds it in narrow domains like competitive math or health-related questions, all while fitting on a single 80GB GPU (or high-end laptop).
gpt-oss-20b fits on devices as small as 16GB, while matching or exceeding OpenAI o3-mini.
Jul 17, 2025 • 7 tweets • 3 min read
ChatGPT can now do work for you using its own computer.
Introducing ChatGPT agent—a unified agentic system combining Operator’s action-taking remote browser, deep research’s web synthesis, and ChatGPT’s conversational strengths.
ChatGPT agent starts rolling out today to Pro, Plus, and Team users.
Pro users will get access by the end of day, while Plus and Team users will get access over the next few days.
We're excited to announce we’ve launched several improvements to ChatGPT search, and today we’re starting to roll out a better shopping experience.
Search has become one of our most popular & fastest growing features, with over 1 billion web searches just in the past week 🧵
Shopping
We’re experimenting with making shopping simpler and faster to find, compare, and buy products in ChatGPT.
✅ Improved product results
✅ Visual product details, pricing, and reviews
✅ Direct links to buy
Product results are chosen independently and are not ads.
These shopping improvements are starting to roll out today to Plus, Pro, Free, and logged-out users everywhere ChatGPT is available. It will take a few days to complete the rollout.
Apr 16, 2025 • 5 tweets • 2 min read
Introducing OpenAI o3 and o4-mini—our smartest and most capable models to date.
For the first time, our reasoning models can agentically use and combine every tool within ChatGPT, including web search, Python, image analysis, file interpretation, and image generation.
OpenAI o3 is a powerful model across multiple domains, setting a new standard for coding, math, science, and visual reasoning tasks.
o4-mini is a remarkably smart model for its speed and cost-efficiency. This allows it to support significantly higher usage limits than o3, making it a strong high-volume, high-throughput option for everyone with questions that benefit from reasoning. openai.com/index/introduc…
Apr 10, 2025 • 4 tweets • 2 min read
Starting today, memory in ChatGPT can now reference all of your past chats to provide more personalized responses, drawing on your preferences and interests to make it even more helpful for writing, getting advice, learning, and beyond.
In addition to the saved memories that were there before, it can now reference your past chats to deliver responses that feel noticeably more relevant and useful.
New conversations naturally build upon what it already knows about you, making interactions feel smoother and uniquely tailored to you.
Feb 25, 2025 • 5 tweets • 1 min read
Deep research is now rolling out to all ChatGPT Plus, Team, Edu, and Enterprise users 🍾
Since the initial launch, we’ve made some improvements to deep research:
✅Embedded images with citations in the output
✅Better at understanding and referencing uploaded files
