So endeth the never-ending week of AI keynotes. What started with Microsoft Build, continued with Google I/O, and ended with Anthropic Code with Claude, plus a big hardware interruption from OpenAI, the week has finally come to a close.

Anthropic has launched two more Claude AI models: Claude Sonnet 4 and Claude Opus 4.

The company said the move is meant "to limit the risk of Claude being misused specifically for the development or acquisition of chemical, biological, radiological, and nuclear (CBRN) weapons."