OpenAI bolsters GPT-5.6 with GPT-Red, Claude Code connects its artifacts to MCP, xAI open-sources Grok Build
On July 15, 2026, OpenAI introduces GPT-Red to harden prompt-injection robustness, Claude Code adds artifacts connected to MCP servers, and xAI releases the source code for Grok Build, among 26 AI announcements of the day.