HARPA AI Browser Agent: One Extension for GPT-5.4, Claude 4.6, and More

HARPA AI is a browser-based AI agent that consolidates multiple large language models—including GPT-5.4, Claude 4.6, DeepSeek, Gemini 3.1, Llama 4, and Perplexity—into a single toolbar. With a 4.7 rating and over 500,000 professional users, it promises to be the only AI extension you need for web browsing. Key features include summarizing YouTube videos (with timestamps and searchable transcripts), drafting emails in your own tone, generating SEO-optimized articles up to 25,000 words, and performing AI-driven SEO audits.

Privacy is a standout: HARPA supports local models like Meta Llama, does not log conversations, is GDPR compliant, and lets you pair any LLM. It also includes a web page monitor for tracking updates, price drop alerts on e-commerce sites, and a browser automation engine for scraping data, filling forms, and triggering IFTTT chains via Zapier, Make.com, and n8n. With over 100 ready-to-use automations for marketing, recruiting, and learning, HARPA aims to replace multiple standalone AI tools with one unified extension.