ChatGPT Study Mode silently removed from menus. Still accessible via /study and /learn shortcuts. Removal confirmed by OpenAI. Claude and Gemini retain study modes.
OpenAI-Apple partnership fracturing: Siri ChatGPT integration revenue well below expectations, legal action under review. Partnership fraying publicly for first time.
OpenAI rolls out GPT-5.5 Instant to ChatGPT and the API, claiming 52.5% fewer hallucinations on high-stakes prompts in medicine, law, and finance.
OpenAI's GPT-5.5 Instant claims 52.5% fewer hallucinations on medical, legal, and financial prompts and is rolling out to all ChatGPT users.
A federal judge ruled DOGE's ChatGPT use 'both dumb and illegal,' triggering federal grant cancellations — a first-of-kind AI-in-government legal ruling.
Canada's Privacy Commissioner found OpenAI violated Canadian privacy laws in developing the original ChatGPT, adding a formal regulatory finding to the AI training data debate.
OpenAI's GPT-5.5 Instant becomes the default ChatGPT model, with factuality gains, memory personalization, and 86% free-tier GPQA benchmark score.
GPT-5.5 Instant replaces prior ChatGPT default: 86% GPQA score (free tier), stronger factuality, memory personalization, API alias gpt-5.5-chat-latest.
Altman says he loses sleep over ChatGPT's launch: 'We may have already done something really bad.' A rare public admission of systemic risk from OpenAI's CEO.
WSJ: OpenAI employees sounded internal alarms after the company failed to report ChatGPT users who described plans for real-world violence to law enforcement.
OpenAI launches Advanced Account Security for ChatGPT—an opt-in hardened sign-in and recovery flow for users at higher risk of targeted attacks.
WSJ reveals OpenAI's CFO warned on compute funding, then was excluded from key infrastructure meetings. Musk trial opens as $852B valuation comes under pressure.
Internet Archive data: ~35% of websites created after ChatGPT's launch are AI-generated or AI-assisted — documenting a structural shift in web content production that predates most regulatory responses.
OpenAI's GPT-5.5 arrives six weeks after 5.4 with a 7-point Terminal-Bench gain, doubled pricing, and cyber/bio safety classifications at HIGH.
ChatGPT's traffic share dropped from 77% to 57% as Gemini surged to 25% via Google distribution and Claude nearly tripled to 6% on product pull alone.
OpenAI makes ChatGPT free for verified US medical professionals and releases HealthBench Professional — an open benchmark that GPT-5.4 outperforms on against physicians.
OpenAI launches ChatGPT Workspace Agents in research preview — cross-tool automation agents for Business, Enterprise, Edu, and Teachers plans.
OpenAI launches free ChatGPT for Clinicians for verified US medical pros and open-sources HealthBench Professional, where GPT-5.4 claims to beat specialty-matched physicians.
OpenAI launches ChatGPT Workspace Agents for paid plans — team-shared agents that run background workflows across docs, email, Slack, and Linear on a schedule without supervision.
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