KNOWLEDGE NOTES

Knowledge Notes

Explore curated knowledge, course notes and methods, with their existing content and sources preserved.

This index lists complete English editions. Additional Chinese notes and bilingual updates remain available in the Chinese index.

350knowledge notes

Shensi Circle / Moves of Leading AI Companies (OpenAI/Anthropic/Google/Apple/Perplexity)

A collection of 71+ pieces on leading company moves from Shensi Circle. OpenAI (19 pieces / Sam Altman as Oppenheimer / Sora / OpenAI fund layout / Operator) / Anthropic (10 pieces / 130 billion revenue / moat = permissions / foray into finance / valuation doubled in three months surpassing OpenAI / marketing self-marketing / 80% retention of overseas talent) / Google (Gemini / Privacy Sandbox / AI rewriting the control layer) / Apple (AI iMessage / iOS integration) / Perplexity (6 pieces / 450 million ARR / 5 major growth engines in three and a half years / business strategy) / Microsoft (Entra ID / Security Copilot) / Karpathy (2 pieces). Covers strategic inflection points, business models, and competitive landscape of leading AI companies

AI CompaniesProduct UpdatesCompetitive landscapeEnglish edition