Merlin

Merlin’s appeal is rather simple. You’re reading an article, viewing a YouTube video, or writing an email to someone, and you need AI support for the information you’re consuming or providing without opening a second browser tab. Just hit Ctrl+M, and you get a sidebar providing access to 20+ different AI models, including GPT-4, Claude, Gemini, Grok, and Llama, for a single subscription fee of $19 per month. The availability of multiple models is frankly the primary reason I switched to it as opposed to solely paying for ChatGPT Plus. You can summarize the article you’re on, respond to a reply in your email, create a graphic for social media, or ask follow-up questions about a YouTube video, and never navigate away from the content you’re interacting with. The freemium tier includes 102 queries per day with no credit card required to allow sufficient usage. Full disclosure, the more recent Chrome Web Store reviews for Merlin seem to be significantly lower than the average overall review count, with several of the last 2026 reviews highlighting the ad popup being added to browser sessions and some functionality issues following recent updates. Still, it’s probably worth trying on the free tier before purchasing the paid tier.

• Category: ChatGPT Extensions
• Pricing: Freemium
• Rating: 4.3 / 5 (0 reviews)
• Platforms: Chrome, Edge, Brave

Key features

• 20 plus AI models in one place — Access GPT-4, Claude, Gemini, Grok, Llama, Mistral and others from a single extension without managing multiple subscriptions
• Universal sidebar — Press Ctrl+M on any webpage and a full AI assistant panel appears without opening a new tab or switching windows
• YouTube video summarization — Get a concise summary of any YouTube video in seconds without watching the whole thing
• Gmail and LinkedIn integration — Draft replies, generate messages, and respond to emails directly inside the platform you are already using
• Webpage summarization — Highlight any text or ask Merlin to summarize the current page instantly from the sidebar
• Image generation — Create images from text prompts using multiple generation models without leaving your browser
• Document analysis — Upload PDFs and ask questions about the content directly inside the Merlin interface
• Google Search integration — Get AI-generated answers alongside standard search results so you see both at once

Pros & Cons

Pros

• Multi-model access for one flat fee is genuinely good value compared to paying separately for ChatGPT Plus, Claude Pro, and Gemini Advanced
• Free plan offers 102 queries per day with no credit card required which is enough to evaluate it properly before paying
• The keyboard shortcut sidebar is fast and unobtrusive, you barely notice it is there until you need it
• YouTube and webpage summarization work reliably and save real time for research-heavy workflows
• Founded in 2021 with a large user base which gives it more stability than newer, less established alternatives

Cons

• Recent Chrome Web Store ratings have dropped notably with 2026 users reporting popup ads injected into paid browser sessions which is a serious trust issue
• The Pro plan advertises generous limits but is capped at around 100 dollars per month in API equivalent usage which catches heavy users off guard
• Responses via Merlin can feel slightly different from using the same models on their native platforms which power users notice quickly
• Firefox and Safari users are excluded from the core extension experience entirely since it is Chrome-only
• Features have been reported to break after updates without clear notification which makes it unreliable for daily professional use

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