What is Merlin?
Merlin is an AI assistant that lets you use several leading language models from one interface. Its web app, Chrome extension and mobile apps (iOS and Android) provide access to models such as o3, GPT-4.1, Claude 3.7 Sonnet, DeepSeek R1, Gemini 2.5 Pro and Grok 3, which the site says are available as soon as they are released.
The Chrome extension works on any website: you can summarize pages, search with a summary, chat with uploaded PDFs, summarize YouTube videos, or draft emails and social media posts. Other features include Projects for building reusable knowledge bases, Crafts for generating infographics, flowcharts and small React app snippets, and image generation with 20+ models. You can also create custom chatbots and prompt libraries that sync across devices.
Key features
- Access to multiple top AI models in one place, including GPT-4.1, Claude 3.7 Sonnet and Gemini 2.5 Pro
- Chrome extension for summarizing pages, searching and asking questions without switching tabs
- Projects for reusable knowledge bases and tailored responses
- Crafts for generating infographics, diagrams and interactive charts from prompts
- Image generation with 20+ image models and aspect ratios
- Custom chatbots and prompt library synced across web, extension and mobile
Who is it for
- Students
- Marketers and content creators
- Entrepreneurs
- Tech professionals and researchers
Pros and cons
- Multiple leading AI models in one subscription-free interface
- Works across web, Chrome extension and mobile apps with synced history
- Provides summaries, email drafting and YouTube video summaries
- Access to the full set of features and models depends on the paid plan
Merlin pricing
| Plan | Price | Includes |
|---|---|---|
| Free | 0 USD | Free access to top AI models, as described on the homepage |
Prices copied from the vendor website, checked October 12, 2026. Currency as shown by the vendor; taxes may apply.
Is Merlin free?
Yes, there is a free plan. Free access to chat with top AI models, as the homepage describes it, with no sign-up required.
Merlin alternatives
| Tool | Price from | Free plan | Category |
|---|---|---|---|
 Monica | 8,3 USD/mo | yes | Chatbots & AI assistants |
 Microsoft Copilot | 27.73 EUR/mo | trial | Chatbots & AI assistants |
 ChatGPT | 34,99 PLN/mo | yes | Chatbots & AI assistants |
 Claude | 17 USD/mo | yes | Chatbots & AI assistants |
 Brave Leo | not listed | yes | Chatbots & AI assistants |
 MaxAI | 12 USD/mo | yes | Browser extensions |
FAQ
What is Merlin used for?
All-in-one AI assistant giving access to top chat models (ChatGPT, Gemini, Claude and more) for research, writing, coding and image creation.
Is Merlin free?
Yes, there is a free plan. Free access to chat with top AI models, as the homepage describes it, with no sign-up required.
How much does Merlin cost?
The vendor does not publish prices publicly or requires sign-in.
What are the best Merlin alternatives?
Closest alternatives: Monica, Microsoft Copilot, ChatGPT, Claude, Brave Leo.
Data checked October 12, 2026 on the vendor website (merlin.foyer.work).