AI command reference
434 commands, shortcuts, plugins and lesser-known features for Claude Code, ChatGPT, Gemini and Codex.
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Recently added
GemsCustom versions of Gemini with a saved name and instructions. On personal accounts they convert to skills automatically starting in November 2026.GeminiFeaturesNew 2026-10Composer predictionsPredicts your next message so you can accept it with Tab. It is in beta.CodexFeaturesNew 2026-10Virtual try-onLets you try on clothes virtually.ChatGPTFeaturesNew 2026-10FinancesHelps organize your financial information.ChatGPTFeaturesNew 2026-10Audio uploadTranscribe a recording, summarize it and ask questions about it.ChatGPTFeaturesNew 2026-10Locked chatsHides chosen chats from your history and search, and opens them only with a PIN or device authentication.ChatGPTFeaturesNew 2026-10
Lesser-known features
Buried in the docs, or easy to miss until you try them.
Custom slash commands (.claude/commands)A single markdown file becomes a /name command.Claude CodeTipsHooks (settings.json)Automatically runs commands on events such as before or after a tool runs.Claude CodeTipsHeadless mode (-p)Runs once without a UI and prints only the result.Claude CodeTips--continue / -cContinues the most recent conversation in the current folder.Claude CodeTips--resume / -rResumes a session by ID or name.Claude CodeTips--fork-sessionResumes a session but branches it off under a new session ID.Claude CodeTips