AI Round-up: May 28, 2026

OpenAI led the snapshot with production-use stories: a self-improving tax-agent case study kept Codex in enterprise workflows, Warp tied open-source development to GPT-5.5, and the OpenAI Foundation announced $250 million for workers and economies navigating AI disruption. Anthropic added a parallel research angle with coding agents in the social sciences, while Reddit kept debating Codex routing, Claude Code add-ons and why non-coding agents fail in production.

Tooling and infrastructure filled out the day. Runway launched an MCP bridge into Claude, ChatGPT, Cursor and Replit, xAI pushed Grok Build into Kilo, and Perplexity open-sourced a faster Unigram tokenizer. The market and hardware lane stayed active through Snowflake's AWS deal, HP's AI PC demand, Amazon's AI shopping technology and memory-chip coverage, while YouTube centred on Codex, Claude Code, Gemini automation and AI account safety.