Doctor & health AI consultant. Medical education, product leadership and wider access to clinical expertise. Enquiries via my website. Impressum below.
Germany
Joined February 2009
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Dr Jack JP O'Sullivan retweeted
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.
We’ve also made caching and inference more efficient, and we’re passing the savings directly to you: 50% lower API prices for Sol and Luna compared with GPT‑5.6 promotional pricing.
Dr Jack JP O'Sullivan retweeted
GPT-6 Astra is our healthiest model yet. ♥️
It sets a new state of the art on HealthBench Professional, our benchmark of real clinician tasks, including care consultations, medical documentation, and research. At its lowest reasoning effort, Astra already surpasses GPT-5.6 Sol’s best score at about half the cost.
This evaluation is intentionally designed to be challenging for our models and focuses on especially complex and rare situations. On another internal evaluation more representative of health questions people often ask ChatGPT, Astra was more than three times less likely to make factual mistakes than GPT-5.6 Sol at their strongest reasoning settings.
We hope this release is another step towards trustworthy, abundant health intelligence for patients and clinicians.
Dr Jack JP O'Sullivan retweeted
Today, we’re bringing ChatGPT closer to the systems, information, and workflows healthcare teams already rely on. ♥️
We’re introducing a new EHR integration to connect supported Epic environments to ChatGPT and a plugin connecting to nine additional industry data sources.
Dr Jack JP O'Sullivan retweeted
We're rolling out Health in ChatGPT to all U.S. users. ♥️
More than 300 million people come to ChatGPT every week with health questions. Today, ChatGPT can bring together the health info you choose to connect to make conversations more personal and useful.
Dr Jack JP O'Sullivan retweeted
Health in ChatGPT is starting to roll out to U.S. users.
You can securely connect Apple Health and supported medical records to understand your information in context, track what has changed, and have more informed conversations.
openai.com/index/health-in-c…
Dr Jack JP O'Sullivan retweeted
♥️ GPT-5.6 is a major step forward for health, both at the frontier and at cost.
These models push the frontier of performance per dollar, bringing the best health intelligence to all. The smallest variant, GPT-5.6 Luna, evaluated at the lowest reasoning effort, outperforms GPT-5.5 at the highest reasoning effort–despite costing 25x less. The largest variant, GPT-5.6 Sol, sets a new high bar at cost.
Another especially cool result: physicians found fewer flaws in GPT-5.6 responses than physician-written responses.
We collected diverse tasks that remain difficult for recent OpenAI models, across patient-facing and clinician-facing use cases. We asked speciality-matched physicians to write responses to these tasks with unlimited time and web access. We then asked other physicians to compare responses side-by-side, blinded to their source. Physicians were asked to comment on areas of improvement across five axes: accuracy, communication, completeness, instruction following, and health decision helpfulness. We then reported the fraction of responses across sources rated perfectly across all axes, across 20,000 total axis ratings. GPT-5.6 Sol appeared strongest, although all GPT-5.6 models performed significantly better than physicians.
GPT-5.6 is a major step forward for health intelligence.
Across the lineup, we’re delivering stronger performance at lower cost: GPT-5.6 Luna outperforms GPT-5.5 at its highest reasoning setting while costing 25x less.
Together, these advances raise quality while making advanced models accessible to more people globally.
Dr Jack JP O'Sullivan retweeted
Leading this work has been one of the greatest privileges of my career.
I truly believe thoughtfully built AI can improve lives and drive meaningful change in health and healthcare. Proud of this team and excited to share a bit more about what we've been building. ❤️🩺
GPT-5.5 Instant is now on par with our frontier Thinking models for health-related questions.
Every week, more than 230 million people turn to ChatGPT with health and wellness questions, and GPT-5.5 Instant is better at recognizing when urgent care may be needed, asking for relevant context, explaining uncertainty, and making complex information easier to understand.
Because GPT-5.5 Instant is available to all free users in ChatGPT, these improvements can help more people.
Physician-led evaluation was critical to making these major intelligence gains.
Dr Jack JP O'Sullivan retweeted
We’re bringing frontier health intelligence to everyone for free in ChatGPT.
GPT-5.5 Instant is a substantial step forward for health–reaching frontier performance–and because it’s available to all free users, more people benefit. 🧵
xitter.cf/OpenAI/status/20676727…
GPT-5.5 Instant is now on par with our frontier Thinking models for health-related questions.
Every week, more than 230 million people turn to ChatGPT with health and wellness questions, and GPT-5.5 Instant is better at recognizing when urgent care may be needed, asking for relevant context, explaining uncertainty, and making complex information easier to understand.
Because GPT-5.5 Instant is available to all free users in ChatGPT, these improvements can help more people.
Physician-led evaluation was critical to making these major intelligence gains.
Dr Jack JP O'Sullivan retweeted
Introducing LifeSciBench, a benchmark for measuring and improving how well AI supports real-world life science research.
Developed with 173 scientists from biotechnology and pharmaceutical research, LifeSciBench includes 750 expert-authored tasks across seven biological research workflows.
openai.com/index/introducing…
Dr Jack JP O'Sullivan retweeted
Proud to have contributed to OpenAI’s #Healthbench Professional, alongside physicians from around the world. This was a unique opportunity to evaluate how AI performs on real clinical tasks and help shape tools designed specifically to support clinicians. @thekaransinghal @rebecc
Dr Jack JP O'Sullivan retweeted
Today we’re introducing two big steps for health at OpenAI:
- ChatGPT for Clinicians, a free version of ChatGPT designed for clinical work
- HealthBench Professional, a new benchmark to evaluate real clinician chat tasks
We’re excited about what this can unlock for care. ❤️
Dr Jack JP O'Sullivan retweeted
In “conversations that reflect real-world use of LLMs, GPT-5.4 correctly recommends immediate care in emergency cases more than 99% of the time”. This team is committed to evaluation integrity and improvement because they care about the real outcomes here ❤️ ⚕️
Dr Jack JP O'Sullivan retweeted
📣Another one, soon after ChatGPT Health: Introducing ChatGPT for Healthcare and OpenAI for Healthcare.
ChatGPT for Healthcare brings health intelligence together with trusted medical evidence, health workflows, enterprise controls, and HIPAA compliance.
openai.com/index/openai-for-…
Dr Jack JP O'Sullivan retweeted
Today we’re launching ChatGPT Health.
People already use ChatGPT to understand test results, prepare for appointments, and make sense of what they’re dealing with. Health brings all of that into a dedicated, private home, with the ability to securely connect apps and medical records.
We’re starting with a small group of users from the waitlist and will expand access over the coming weeks.
Learn more: openai.com/index/introducing…
Dr Jack JP O'Sullivan retweeted
2026 may be the year AI begins delivering its most tangible benefit to humanity: better health.
Over 200M people already use ChatGPT every week to navigate their health across billions of messages — and today, we’re introducing ChatGPT Health ♥️
🧵
openai.com/index/introducing…
Dr Jack JP O'Sullivan retweeted
No doctor today is worth less than they were 17 years ago.
That’s why we’re standing together for #PayRestoration.
ALT Striking doctors in orange hats and vests hold signs reading 'pay restoration for doctors' and '£18.62/hour is not a fair wage for a resident doctor', with Big Ben in the background.
Dr Jack JP O'Sullivan retweeted
next big thing: Agent Simulations 🔥
run your agent on many simulated scenarios to test it's doing the right thing
✨ auto-simulate users in different edge cases
📊 judge, tool calls check, simulation control
🧑💻 open-source, compatible with all AI frameworks
Dr Jack JP O'Sullivan retweeted
📣 Proud to share HealthBench, an open-source benchmark from our Health AI team at OpenAI, measuring LLM performance and safety across 5000 realistic health conversations. 🧵
Unlike previous narrow benchmarks, HealthBench enables meaningful open-ended evaluation through 48,562 unique physician-written rubric criteria spanning several health contexts (e.g., emergencies, global health) and behavioral dimensions (e.g., accuracy, instruction following, communication).
Blog, paper, code: openai.com/index/healthbench…
Dr Jack JP O'Sullivan retweeted
I’m incredibly proud to lead the physician team contributing to OpenAI’s #Healthbench and to have helped shape the framework for its design. Evaluating how AI performs on real health challenges is essential!
📣 Proud to share HealthBench, an open-source benchmark from our Health AI team at OpenAI, measuring LLM performance and safety across 5000 realistic health conversations. 🧵
Unlike previous narrow benchmarks, HealthBench enables meaningful open-ended evaluation through 48,562 unique physician-written rubric criteria spanning several health contexts (e.g., emergencies, global health) and behavioral dimensions (e.g., accuracy, instruction following, communication).
Blog, paper, code: openai.com/index/healthbench…