OpenAI announced that GPT-5.4 Thinking and GPT-5.4 Pro are rolling out in ChatGPT, while GPT-5.4 is already available in the API and Codex. The launch positions GPT-5.4 as a unified frontier model for reasoning, coding, and agentic workflows.
On March 3, 2026 (UTC), OpenAI said on X that GPT-5.3 Instant is rolling out to all ChatGPT users. Its linked product post details improvements in refusal behavior, web-grounded answer synthesis, and availability across ChatGPT and API.
OpenAI released GPT-5.3 Instant on March 3, 2026, claiming fewer unnecessary refusals, better web synthesis, and double-digit hallucination reductions across internal evaluations.
OpenAI released GPT-5.3 Instant on March 3, 2026 as a faster, cheaper derivative of GPT-5.3 for day-to-day use. The company says it matches GPT-4.1 latency and pricing while improving instruction following and reducing hallucinations.
Anthropic's Claude iOS app shot to number one on the US App Store as users switched from ChatGPT in solidarity with Anthropic's decision to refuse Pentagon military surveillance requests.
A study published in Science journal found that ChatGPT surfaced a surprising insight in particle physics research that human scientists had missed, raising new questions about AI's role in scientific discovery.
The 'Cancel ChatGPT' movement has gone mainstream following OpenAI's deal with the U.S. Department of Defense. Anthropic's refusal to apply Claude to mass surveillance or autonomous weapons has driven a wave of user migration from ChatGPT to Claude.
OpenAI closed a $110B round led by Amazon ($50B), Nvidia ($30B), and SoftBank ($30B). ChatGPT now reaches 900 million weekly active users and 50 million paying subscribers.
OpenAI is finalizing a record-breaking $100B+ funding round valuing the company at over $850B. Amazon, Nvidia, SoftBank, and Microsoft are among the key investors, marking the largest private tech fundraise in history.
OpenAI announced GPT-5 on 2025-08-07 for both ChatGPT and API usage. The launch highlights include a reported 45% hallucination reduction vs GPT-4o and major benchmark gains such as HealthBench Hard 44.6.
On February 12, 2026, OpenAI introduced ChatGPT deep research, an agentic workflow designed to run multi-step web investigations and produce citation-backed reports. The release targets higher-value knowledge work where traceable evidence matters as much as speed.
OpenAI reports that, across more than one million ChatGPT conversations, the share of difficult interactions exceeding a human baseline increased roughly fourfold from September 2024 to January 2026. The company also shows large gains in case-interview and puzzle-style open tasks.