AI Round-up: May 29, 2026

Anthropic dominated the snapshot: it announced a $65B Series H at a $965B post-money valuation, said run-rate revenue crossed $47B, and pushed Claude Opus 4.8 into GitHub Copilot, Perplexity, Microsoft 365 and Databricks workflows. Reddit echoed the valuation story alongside Codex safety and Claude Code audit discussions, while YouTube centred on Opus 4.8 and long-running coding tasks.

The rest of the day was a tooling push. Microsoft launched Microsoft 365 Business with Copilot and a redesigned Copilot app, Mistral introduced Search Toolkit and Vibe Agent while joining Copilot Studio, OpenAI published Endava's Codex organisation story and its Frontier Governance Framework, Replit launched Canvas, xAI updated Grok Build, and security threads covered fake Codex malware and typosquatted npm packages.