Timeline
Codex reaches 5 million weekly users, up 400% from start of year
Codex users can now save rate limit resets, starting with one free saved reset for Go, Plus, Pro, and Business tiers.
OpenAI acquired cloud startup Ona to support AI agent infrastructure
OpenAI closed a $6.6B round at a $157B valuation
OpenAI closed a $6.6B funding round at a $157B valuation
Coatue predicts imminent AI-driven IPO wave involving OpenAI
Microsoft unveiled MAI-Thinking-1, a 35B active parameter reasoning model scoring 97% on AIME 2025.
Microsoft released RAMPART, a pytest-native framework for testing AI agent safety
Released SkillOpt, training agent skills in text space
Released MAI-Transcribe-1, MAI-Voice-1, and MAI-Image-2 AI models
Ecosystem
Microsoft
OpenAI
Evidence (15 articles)
OpenAI's $100B Funding Round Poised to Shatter Records with $850B+ Valuation
Feb 19, 2026OpenAI Raises $122B at $852B Valuation, Reveals $2B Monthly Revenue and 900M Weekly Users
Mar 31, 2026Satellite Data Shows 40% of 2026 AI Data Centers at Risk of Delay
Apr 17, 2026Figure AI's Humanoid Robots Deployed at BMW, Signaling Industry Acceleration
Apr 19, 2026Anthropic's Cowork Built with Claude Code, Used at Microsoft, Google, OpenAI
Apr 13, 2026GPT-4's Public Debut Was 'Insane' Bing Chatbot 'Sydney' Months Before Official Launch
Mar 15, 2026Agentic storefronts: How AI agents are reshaping the shopping journey from
Apr 23, 2026OpenAI-Microsoft Deal: Loosens Ties, Boosts Azure AI Revenue
Apr 27, 2026+ 7 more articles