HARPA AI

What it does

HARPA AI is a browser extension that brings GPT-5.4, Claude 4.6, Gemini 3.1, DeepSeek, Perplexity, Grok and Llama 4 into one place. It summarizes YouTube videos, blogs and PDFs, answers emails, generates articles, extracts data and automates work on web pages. It also supports local models, does not log conversations and is GDPR compliant.

HARPA AI is a browser extension for people who want several AI models without leaving the page they are on. Press Alt + A to reach GPT-5.4, Claude 4.6, DeepSeek, Gemini 3.1, Llama 4 and Perplexity, or use the // shortcut for commands like finish, grammar check, rephrase, translate, search and explain. It summarizes YouTube videos, blogs and PDFs, drafts Gmail replies, monitors pages for changes and can run browser automations that navigate sites, extract data, click buttons and fill forms. The pricing page lists an annual plan at 14.3 euros per month with 75 megatokens per year, a Pro plan at 19.6 euros per month with 225 megatokens per year, and a lifetime option at 238 euros. Scheduling and advanced automation are not included in the cheaper tier. HARPA states that it runs locally, does not store your data and is GDPR compliant, and it supports local models like Meta Llama. You can bring your own API keys or use web session connections. The page says it is trusted by 500,000 professionals with an average review score of 4.7.