What is Claude Code?

Claude Code is an action-based AI coding tool from Anthropic that writes code autonomously. As of mid-2026, it enables parallel agent execution and codebase-wide analysis, with users connecting it to custom MCPs and employing it for automated research tasks.

• Apr 2026 - Cat Wu said Claude Code ships features in research preview and that the 2024 generation of products were chat-based while the Claude Code generation is action-based.
• May 2026 - Josh Brown said over 90% of code inside Anthropic is written by Claude Code.
• Jun 2026 - Devvret Rishi said people were connecting Claude Code to custom MCPs via MCP servers.
• Jun 2026 - Ronak Malde said binary signals like accept/reject or thumbs up/down in Claude Code are very noisy, as users rarely use them and tend to vibe-accept everything.
• Jul 2026 - Ben Carlson said US software development job postings are up 15% since the launch of Claude Code in late February 2025, while overall job postings fell by 7% over the same period, with 71% of the gains coming from senior roles.
• Jul 2026 - Nathaniel Whittemore said Anthropic reported that 65% of its product team code was now being produced by initiating Claude Code from Slack, not from the Claude app or terminal.