There is a quiet revolution happening inside the glass towers of Wall Street, and it's wearing Elon Musk's fingerprints.
According to reporting by The Japan Times and CIO Dive, Apollo Global Management and Morgan Stanley have both begun internal testing of xAI's Grok chatbot, evaluating it alongside other AI providers as they build out their enterprise AI strategies. Apollo manages over $650 billion in assets. Morgan Stanley is one of the most influential financial institutions on the planet. When they run a new AI system, it matters.
Grok 4.3: The Model Behind the Momentum
The version of Grok that Wall Street is now testing is Grok 4.3, launched on May 4, 2026. It is xAI's cost-efficient flagship model, built around three capabilities that enterprise customers have been demanding: built-in reasoning, a 1-million-token context window, and native video input. At $1.25 per million input tokens, it undercuts comparable models from OpenAI and Anthropic while matching or exceeding them on key benchmarks. The 1-million-token context window is particularly significant for financial services firms, where use cases often require processing hundreds of pages of regulatory filings or legal contracts in a single query.
Grok Build: The Coding Agent That Changes Everything
On May 19, xAI launched Grok Build — a direct competitor to Anthropic's Claude Code and OpenAI's Codex. Available initially to SuperGrok Heavy subscribers at $300 per month, Grok Build is a terminal-based agentic coding tool that lets developers generate code, navigate codebases, and complete complex programming tasks using natural language. The agent operates directly from the command line, integrating with existing developer environments. Early testers have described it as remarkably capable at multi-file refactoring, documentation generation, and test writing.
Third-Party Connectors: Grok as a Platform
Also launched this month: Grok's third-party connector system, which lets users build and deploy sites via Vercel, create designs in Canva, assemble presentations in Gamma, and pull live market data from S&P Global — all without leaving the Grok interface. Combined with Grok Skills, which give users persistent custom expertise that carries across conversations, Grok is evolving from a chatbot into a full productivity platform.
The Bigger Picture
When Musk founded xAI in 2023, the company faced a seemingly insurmountable lead from OpenAI, Google, and Anthropic. Two years later, xAI has built a model that Wall Street's most sophisticated institutions are evaluating seriously, a coding agent competitive with the best in the field, and a connector ecosystem that rivals anything currently on the market. The race for AI supremacy is far from over — but Grok is no longer a challenger. It's a contender.
