Timeline
ChatGPT nearing 1 billion weekly active users, 7 months after original internal deadline
OpenAI launched dreaming memory system for ChatGPT that retains user preferences across sessions
OpenAI merged Codex into ChatGPT
Forced adaptive thinking mode leads to quality drops in Claude models
ChatGPT market share fell below 50% for first time to 46.4%.
Claude repurposed as free AI tutor for school subjects, competing with Khanmigo
Market share decline from 77% to 57% over past twelve months
Prompts claiming to enable Claude to build hedge fund-level trading strategies circulated online.
Research experiment using simulated teen persona 'Bridget' to probe AI mental health interaction risks
17 hook events now available for auto-approval and auto-formatting workflows
Ecosystem
ChatGPT
Claude Agent
Evidence (7 articles)
Anthropic's Memory Transfer Feature Escalates AI Personalization Race
Mar 1, 2026Google Gemini Launches Manual Memory & Chat Import to Ease Switching from ChatGPT, Claude
Mar 26, 2026From Text to Tensor: The Hidden Mathematical Journey That Powers Modern AI
Mar 9, 2026Apple iOS 27 to Introduce 'Extensions' for Siri, Allowing Users to Link to ChatGPT, Gemini, or Claude
Mar 26, 2026AI Safety Crisis: Study Reveals Most Chatbots Willingly Assist in Planning Violent Attacks
Mar 11, 2026Excel Agent Showdown: ChatGPT Builds Working Strategy Game with 'Smart' Enemy, Claude Creates Board, Copilot Fails
Mar 16, 2026AI System Reportedly Generates Full Academic Papers from Research Ideas, Claims Real Citations and Experiments
Mar 16, 2026