Companies

The labs and businesses that make the tools.

All Beginner Beginner Intermediate Intermediate Advanced Advanced

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The company behind Claude, Claude Code, and the MCP standard.

OpenAI Beginner

The company behind ChatGPT, the GPT models, Codex, and Dots.

Beginner You've used ChatGPT or Claude. Intermediate You set up tools and workflows. Advanced You build with models or APIs.