Best Chrome Extensions for Claude AI in 2026

Prophet is a Chrome extension built specifically around Claude AI. It lives in the Chrome side panel and provides three Claude model options: Haiku 4.5 for fast, affordable tasks; Sonnet 4.6 for balanced performance; and Opus 4.6 for the most complex reasoning. What makes Prophet unique among Claude extensions is its browser automation layer. Using 18 built-in tools, Prophet can interact with web pages on your behalf: clicking buttons, filling forms, navigating between pages, extracting data, and managing browser tabs. This is powered by the accessibility tree rather than screenshots, making it faster and more reliable than vision-based approaches. The pay-per-use credit system means you pay only for the API tokens you consume, with higher tiers offering bonus credits. For Claude power users who want the AI to not just analyze web pages but take action on them, Prophet is the most capable option. The entire codebase is open source on GitHub, providing full transparency into how Claude is integrated and how your data flows through the system.

Claude in Chrome is Anthropic's official browser extension. It provides Claude as a sidebar assistant that can see and interact with web pages using Computer Use, Anthropic's screenshot-based browser automation technology. Since it comes directly from Anthropic, it has the deepest integration with Claude's capabilities and is the first to receive new features. The extension requires an active Claude Pro, Team, or Enterprise subscription. Computer Use works by taking screenshots of the page, analyzing them with Claude's vision capabilities, and then simulating mouse clicks at specific coordinates. This approach is flexible but inherently slower and more expensive in tokens than text-based methods. Claude in Chrome is the best choice for users already paying for a Claude subscription who want official support and the latest Claude features. However, the subscription-based pricing means you pay the same whether you use the extension for 5 minutes or 5 hours per day.

Monica is a popular multi-model AI extension that includes Claude 3.5 Sonnet among its available models. While not Claude-exclusive, Monica provides a convenient way to access Claude alongside GPT-4o and Gemini in a single extension. You can switch between models based on the task: use Claude for nuanced writing and analysis, GPT for general chat, and Gemini for tasks that benefit from Google's data. Monica's Claude access is limited to Claude 3.5 Sonnet; it does not offer Haiku or Opus options. The sidebar interface is polished and includes translation, summarization, rewriting, and image generation tools. For users who want Claude as one tool in a broader AI toolkit rather than their primary model, Monica is a solid choice. However, the Claude model version tends to lag behind the latest releases.

Sider includes Claude 3.5 Sonnet as one of its available models within its reading and writing sidebar. Sider's unique group chat feature lets you compare Claude's response against GPT and Gemini on the same prompt, which is valuable for understanding each model's strengths. Claude on Sider is best for text analysis, summarization, and content generation tasks. The sidebar adapts its tools based on the current page context, offering different options for articles, code, email, and general browsing. Like Monica, Sider provides Claude access within a multi-model framework, but with a stronger emphasis on reading assistance and content comprehension. The Claude model selection is limited to Sonnet, and power users who need Haiku for cost efficiency or Opus for maximum capability will need to look elsewhere.

Harpa AI supports Claude through its bring-your-own-key (BYOK) feature. Instead of paying Harpa for Claude access, you enter your own Anthropic API key and pay Anthropic directly for usage. This gives you access to any Claude model available through the API, including the latest releases, at Anthropic's direct pricing without markup. Harpa adds value through its web monitoring features (price tracking, page change alerts) and custom command system. The BYOK approach makes Harpa the most cost-effective way to use Claude in a browser extension if you already have an Anthropic API key. However, the setup requires technical knowledge, and the interface prioritizes power users over simplicity. Harpa's automation is focused on monitoring and alerts rather than interactive browser control.