Grok 4.3 lands on Microsoft Foundry as xAI pitches Wall Street

xAI's Grok 4.3 debuted on Microsoft Foundry with 200K context, improved tool calling, and reduced hallucinations for agentic workflows. Simultaneously, xAI is recruiting Apollo, Morgan Stanley and other Wall Street firms to test Grok for financial tasks, and is retiring older Grok models May 15.