Sider is a multi-model AI sidebar extension for Chrome, Edge, Safari and Firefox that brings GPT-4, Claude 3.5, Gemini and DALL·E into a single pane next to any webpage. With Sider open you can summarize the page you are reading, ask follow-up questions about a PDF, rewrite or translate selected text, generate images, extract text from screenshots, summarize YouTube videos, and chat with linked documents — all without switching tabs. Used by 2M+ users worldwide, Sider also bundles a desktop app and mobile companion so your AI chat history follows you across devices.
One-keystroke chat sidebar overlays any webpage with GPT-4o, Claude 3.5, Gemini, Mistral, and DeepSeek without leaving your tab.
Summarize long articles, research papers, and PDFs with one click — bullet points, key takeaways, or custom-style summaries.
Upload PDFs and chat with them — Sider parses citations, table data, and long documents while answering questions from the source.
Built-in text-to-image (DALL·E, Stable Diffusion), AI image editing, background removal, and image-to-prompt reverse generation.
Create reusable AI personas with custom system prompts — interview coach, code reviewer, marketing strategist — and switch them mid-chat.
Sider connects to live web search with citations — fact-check claims, get current news, and link back to sources.
Run the same prompt against GPT-4o, Claude, and Gemini side-by-side to compare responses — pick the best for your task.
Chrome, Edge, Brave, Firefox extension plus iOS/Android apps with chat history sync across devices.
Sider is the all-in-one browser AI assistant — chat with top LLMs, summarize pages, generate images, and compare model responses without leaving the page.
Watch real Sider tutorials covering sidebar usage, AI personas, and workflow integrations.
Sider is a multi-model AI sidebar extension that bundles top AI models, document chat, image generation, and translation into a single browser interface. Rather than juggling subscriptions to ChatGPT, Claude, and Gemini separately, Sider lets users switch models on the fly. Below are the key services Sider delivers.
Sider offers a generous free plan and three paid tiers with model access scaling per tier. Annual billing is significantly discounted vs. monthly.
| Plan | Price (monthly) | Best For |
|---|---|---|
| Free | $0 | Daily quota for basic summarization and quick tasks |
| Basic | $10 / month | Light users wanting GPT, Claude, and Gemini access |
| Plus | $40 / month | Power users wanting unlimited credits, deep research, and image/video generation |
| Ultra | $200 / month | Heavy users and pros needing the highest credit allocation and priority access |
On the Chrome Web Store (4.7+/5) with millions of installs, users praise the multi-LLM access and the sidebar UX. Critiques typically involve free-tier quotas and occasional sluggish responses during peak hours.
Sider lets me ask Claude 3.5 about a paper, then GPT-4 about another, in the same sidebar. The PDF chat handles my 200-page research papers without choking. Pro annual at $149 is half what I would pay for ChatGPT Plus + Claude Pro separately.
I use Sider mainly for YouTube summaries and rewriting newsletter drafts. The 5-summaries-total cap on free was annoying, so I upgraded to Basic. Worth every penny — saves me 3 hours a week of skimming long-form video research.
The image generator (Painter) plus chat-with-PDF combo is what sold me. I drop in a competitor whitepaper, ask Claude to extract their pricing model, then have DALL·E mock up a one-pager — all from one sidebar. Insane productivity boost.
Looking at alternatives to Sider? The leading browser AI assistants and sidebar tools are:
Sider is a multi-model AI sidebar browser extension that bundles GPT-4, Claude 3.5, Gemini, and DALL·E into one interface across Chrome, Edge, Safari, and Firefox. This section answers the most common questions based on our review of Sider pricing, official feature documentation, and user feedback on the Chrome Web Store, G2, and Reddit. Whether you are comparing Sider pricing, evaluating its model selection, or deciding if it replaces ChatGPT Plus, these FAQs cover what matters most.
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