OpenAI has overtaken SpaceX to become the world’s most valuable private company after a $6.6 billion employee share sale at a $500 billion valuation.

OpenAI announced new measures for its AI video app Sora, letting copyright owners block unauthorised use of their characters, and rolling out a revenue-sharing model for content that’s allowed.

OpenAI has signed a multi-year deal with AMD to deploy up to 6 GW of Instinct MI450 GPUs, starting with 1 GW in H2 2026. The partnership diversifies OpenAI’s chip supply beyond NVIDIA and includes an option for OpenAI to acquire up to 10% of AMD via warrants.