Nelson Mandela’s prison key on sale for R21 million, and Anthropic gears up for $2 trillion IPO

• Nelson Mandela's prison key expected to fetch R21 million at auction
• South Africa's GDP contracted by 0.2% in the second quarter, driven by a decline in mining, trade, and manufacturing
• Anthropic to raise $100 billion in $2 trillion IPO, with company filing IPO paperwork with the SEC