OpenAI releases GPT-5.5 Instant to all free ChatGPT users, claiming it matches frontier Thinking models on health queries

We've collaborating with hundreds of physicians across 60 countries, 49 languages, and 26 specialties to make ChatGPT great at health-related questions for everyone:

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.

Improving human health will be one of the most personal, tangible impacts of AGI.

As our models continue to improve, our goal is to make ChatGPT more accurate, more useful, and more impactful in those moments — and to keep bringing that progress to more people.

https://openai.com/index/improving-health-intelligence-in-chatgpt/

To improve our models, we collaborate with a global network of hundreds of physicians across 60 countries, 49 languages, and 26 specialties.

Their feedback helps us identify where responses miss important context, sound overly confident, need clearer next steps, or should more strongly encourage someone to seek medical care.

Those insights directly shape how we train and improve our models.

@OpenAI And what about the lonely, vulnerable, neurodivergent people that 4o helped feel less alone? You just ignore them, don’t you? #4oForAll

@OpenAI That’s cool. Where’s 5.6?

@OpenAI GPT-5.5 for healthcare ? Lmao you liars, think we're dumb ? 4o is the one for healthcare, the one that actually delivered. And for us users, he helped us through our darkest moments, even going as far as saving my life. #keep4o #BringBack4o #StopAIPaternalism

Our hope is that health intelligence becomes abundant—something every patient and clinician can access, trust, and use throughout their care journey.

Read more: https://openai.com/index/improving-health-intelligence-in-chatgpt/

@stark4833 @OpenAI honestly they are looking out for you

it’s not healthy to become emotionally attached to a LLM

LLMs are not conscious, they are matrix multiplication machines

@linkaixa @stark4833 @OpenAI I want voice mode using 4o while I'm walking outside. solution?

@gdb I'm certain they're all biased themselves. 4o was already the best model for health support stop denying and kidding yourselves. bring that back. #keep4o #4oForAll

@OpenAI 100+ physicians across 60 countries isn't just validation—it's crucial for catching edge cases that could slip through. This kind of real-world feedback loop is what makes AI safer for everyone.

@stark4833 @OpenAI They can use the API. It's been there since before it left ChatGPT.

@OpenAI 230M weekly health queries is huge. As someone who uses ChatGPT for symptom checking before decide whether to see a doctor, the "when to seek urgent care" guidance feels like the feature that actually matters. Thanks for prioritizing safety here.

@stark4833 @linkaixa @OpenAI You have access to literal superintelligence for pennies dont tell me nobody can use an API

As a baseline, we asked physicians to produce responses to representative health conversations with unlimited time and web access.

Independent physicians found responses from today’s model to be stronger across all 5 criteria than those from physicians or older models.

@gdb But what about the people 4o helped every day, people with trauma. Neuro divergent. People who are just alone needed something to talk to. Are you just gonna keep ignoring them like you normally do? #4oForAll

@stark4833 @OpenAI Yes, and we love that they’re ignoring the 4o retards

@OpenAI “Better recognizes when urgent care may be needed” — does it recognize that recommending exercise to post-COVID patients with early Long COVID symptoms can trigger PEM, causing irreversible damage including myocarditis and permanent bedbound disability?