Sider
Sider puts GPT, Claude, Gemini and DeepSeek into a browser sidebar for chat, PDF and page summaries. See its 2026 pricing tiers and top alternatives.
About Sider
Sider is a browser extension in the chatbot and virtual assistant category that adds a sidebar to any tab, giving you access to more than 20 AI models, including GPT, Claude, Gemini, DeepSeek, and Grok, for reading, writing, translating, and summarizing without leaving the page you’re on.
What is Sider (2026 update)
Sider works as a persistent sidebar inside your browser rather than a separate app you have to switch to. You can highlight text on any webpage, ask Sider to summarize it, translate it, or rewrite it, and you can switch between underlying AI models per query depending on the task. It also handles PDF summarizing and long-document reading, and includes a media generation tool called Creator for images and video.
What is new in 2026
Sider added Claude Opus 4.6 to its model lineup in 2026, bringing adaptive reasoning that scales thinking depth to task difficulty, a much larger context window with compaction for handling big documents with better recall, and stronger agentic coding support for multi-step debugging. It also added the DeepSeek V4 family, including a lightweight DeepSeek-V4-Flash model for fast daily chat and coding and a flagship DeepSeek-V4-Pro model aimed at matching top closed-source models on reasoning, coding, and math. Sider’s image tool, previously called Painter, was rebuilt and rebranded as Creator with added video generation capability, and the company shipped a Knowledge Graph feature for ChatGPT that turns files or topics into a clickable network of connected concepts. Additional models, including Seedance 1.5 Pro and Nano Banana 2, were added to expand generation options.
Key features
- Sidebar access to 20+ AI models (GPT, Claude, Gemini, DeepSeek, Grok) inside any browser tab
- Page and PDF summarizing, plus translation and rewriting of highlighted text
- Per-query model switching so you can pick the model suited to a task
- Creator tool for AI image and video generation
- Knowledge Graph feature that visualizes connections between concepts in a document or topic
Pricing in 2026
Sider runs a free plan plus three paid tiers billed monthly or annually, with annual billing offering a discount. Credit and query limits vary by plan, check the official site for the current free plan allowance and any promotional pricing.
| Plan | Price | What you get |
|---|---|---|
| Free | Free | Limited daily basic credits, enough for occasional highlights and page or YouTube summaries, check the official site for current limits |
| Basic | $10/month, $8.33/month billed annually | 3,000 fast text queries/month, 100 advanced queries/month, 200 image queries/month, 1,000 PDFs/month |
| Pro | $20/month, discounted with annual billing | 10,000 fast text queries/month, 300 advanced queries/month, 600 image queries/month, 2,000 PDFs/month |
| Ultra | $30/month, discounted with annual billing | Unlimited fast and advanced text queries, 1,000 image queries/month, 3,000 PDFs/month |
Who should use it
Sider fits people who spend most of their day inside a browser and want AI help, summaries, or translation without opening a separate chat app or copy-pasting text between tabs. It is a good fit if you want to compare answers across multiple models like GPT, Claude, and Gemini in one place rather than paying for each provider’s own subscription.
Limitations and alternatives
The free plan’s daily credit allowance is thin, and heavier features like advanced queries and image generation are metered separately from basic text queries, so a plan that looks generous on fast queries can still run short on advanced ones. Exact current free plan limits and any promotional pricing should be confirmed on the official site before you commit to a paid tier. If you mainly want a single model’s own interface, using ChatGPT, Claude, or Gemini directly avoids the extra subscription layer. Merlin is a similar browser sidebar assistant with multi-model access. Monica is another comparable browser extension offering chat, writing, and page summarization across multiple AI models.
Frequently asked questions
What AI models does Sider support?
Sider gives access to over 20 AI models in one sidebar, including GPT, Claude (including Claude Opus 4.6), Gemini, DeepSeek V4, and Grok, and you can switch models per query.
How much does Sider cost in 2026?
Sider's paid plans are Basic at $10/month, Pro at $20/month, and Ultra at $30/month, each with a discount for annual billing. A free plan with limited daily credits is also available.
Does Sider work on mobile or only in the browser?
Sider is primarily a browser sidebar extension. Check the official site for current mobile app availability.
What are good alternatives to Sider?
Alternatives include Merlin and Monica, both browser sidebar assistants offering multi-model chat and page summarization, or using ChatGPT, Claude, or Gemini directly if you only need one model's own interface.
Information last verified: September 2026.
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