Elon Musk's X to Open Source New Algorithm in Seven Days

• Elon Musk announced X will open source its new algorithm, including code for organic and advertising post recommendations, within seven days.
• The open-sourcing process will be repeated every four weeks, accompanied by comprehensive developer notes.
• The European Commission extended a retention order on X related to algorithms and illegal content until the end of 2026.
• Paris prosecutors investigated X in July 2025 for suspected algorithmic bias and fraudulent data extraction, which X called a "politically-motivated criminal investigation."
• The EU fined X 120 million euros for breaching transparency obligations under the Digital Services Act, citing issues with its "blue checkmark" subscription and ad repository.

Why It Matters: X will open source its algorithm, facing regulatory scrutiny and fines from European authorities.