2025-11-18, equity
Disclosed: $5bn
Committed: undisclosed
Basis: announced ceiling
Confidence: high
Term: undisclosed
Anthropic, 2025-11-18
Microsoft committed to invest up to 5 billion US dollars in Anthropic alongside Anthropic's Azure compute commitment.
amazon>openai>microsoft>anthropic
OpenAI announced a $250B compute commitment to Microsoft on 2025-10-28, and Microsoft an equity investment of up to $5B in Anthropic on 2025-11-18. Amazon announced $50B of equity in OpenAI on 2026-02-27, and Anthropic a $100B compute commitment to Amazon over ten years on 2026-04-20. All four figures are announced ceilings; the committed amounts are undisclosed.
Closed on 2026-04-20