Anthropic surpasses OpenAI to become the world's most valuable AI startup

What happened

Reports on May 30 confirm Anthropic closed a round at a valuation above $965B, surpassing OpenAI, which was valued at $852B in March 2026.

Context and impact

For Anthropic this is a symbolic moment — from a smaller rival it is now the benchmark valuation for the entire sector. Bloomberg concurrently reports Anthropic filed for IPO confidentially on June 1, 2026.

Details

• Anthropic valuation: >$965B
• OpenAI valuation (March 2026): $852B
• IPO filing: June 1, 2026 (confidential)