Timeline
ChatGPT nearing 1 billion weekly active users, 7 months after original internal deadline
Opus 5 achieves 0% prompt injection success rate in 129 browser agent tests with Auto Mode enabled
Anthropic's Claude Code became a leading agentic coding tool
Launched Claude Lite, a cost-efficient AI model for everyday tasks
Launched Claude Opus 5 with a shift toward fewer rules and trusting model judgment
Released Claude Opus 5 with 1M token context, 128k output, claiming Fable-5-approaching intelligence at half the price
Anthropic released Claude Opus 5, their newest Opus model, available in Claude Code
OpenAI launched dreaming memory system for ChatGPT that retains user preferences across sessions
OpenAI merged Codex into ChatGPT
ChatGPT market share fell below 50% for first time to 46.4%.
Ecosystem
ChatGPT
Anthropic
Evidence (15 articles)
The Hidden Engine Behind Anthropic's Explosive Growth: Enterprise API Revenue
Mar 11, 2026Kimi Launches OpenClaw-Powered Workspace: China's Browser-Based AI Revolution
Feb 15, 2026OpenAI Projects $2.5B in 2026 Ad Revenue, Targets $100B by 2030
Apr 9, 2026Game Theory Exposes Critical Gaps in AI Safety: New Benchmark Reveals Multi-Agent Risks
Feb 12, 2026Nvidia's AI Infrastructure Bet: $3.8B Bond Sale Signals Investor Confidence in Data Center Boom
Feb 13, 2026The Hidden Hand: Anthropic's Stealth AI Edits Spark Developer Backlash
Feb 16, 2026ChatGPT's AI Traffic Share Falls to 57% as Gemini Hits 25%, Claude at 6%
Apr 16, 2026Claude's Paying Consumer Base Grew 75% Since January, Indagari Data Shows
Jun 25, 2026+ 7 more articles