This is not just another browser assistant. It applies edits in place, understands your voice and history, works with PDFs, generates images in the sidebar, and lets you choose the model you trust.
Ceres sidebar is more than an AI sidebar with suggestions and image generation. It integrates deeply with your current workflow, understands your voice, reads any tab or PDF, and gives smart, applicable suggestions directly in place. It feels more like an AI browser than a simple sidebar: a real AI partner while you browse and write.
Start with rough text and improve it fast. Ceres can add missing details, complete a reply, clean up text, translate it, and even improve a product description. Turn a short note into something ready to send with a simple voice prompt. Just say what you need, and AI will format your writing. You are the boss, and AI is the engine.
Ceres can read the current page, read browser history, and search the internet. If you want a meaningful assistant that can create enriched articles without switching to a separate app or giving instructions from scratch, Ceres keeps that workflow close.
Connect OpenRouter, OpenAI, DeepSeek, Ollama, LM Studio, local AI, on-device AI, or another compatible provider. Use stronger models for serious work, lighter models for quick edits, and image generation when the task needs visuals.
The user crops an area from the current page and sends it to the Ceres sidebar. Ceres can then communicate with that selected piece as context: visual assets, photos, text, UI parts, screenshots, or anything visible on the page.
Most browser work is still writing: emails, forms, replies, descriptions, tickets, comments, docs, and little text boxes everywhere.
Ceres helps at the moment you are editing. Select the text, say what should change, use page context when needed, and apply the result without opening a separate AI tab.
The voice command is the fast hook. The full sidebar gives you direct apply actions, web context, PDFs, URLs, images, and model control.
Ceres keeps useful browser-side tools close to the same workflow, so you do not need to bounce between disconnected tabs just to gather context or inspect recent work.
Look outward when the task needs current information instead of guessing from stale context.
Pull useful content from the web directly into the flow when a page already has the reference you need.
Bring documents into the same workspace without breaking the task just to inspect a separate file viewer.
Get a quick overview of recent work when you need to reconnect the current page with what came before.
Crop a page area and pass it to the sidebar as visual or text context.
Ceres focuses on the actions that save time while you write and research: spoken edit instructions, text expansion, direct apply actions, page context, PDF reading, URL reading, image generation, custom APIs, and local model support.
| Feature | Ceres | Sider | Gemini in Chrome | MaxAI | Merlin | HARPA AI |
|---|---|---|---|---|---|---|
| Local models / device AI | Yes via Ollama/LM Studio | No | No | No | No | Yes via Ollama/LM Studio |
| Web search | Yes | Yes | Limited | Yes | Yes | Yes |
| Read current page / URL | Yes | Yes | Yes | Yes | Yes | Yes |
| Apply text in place | Yes | No | No | No | No | No |
| Spoken edit instructions | Yes | No | No | No | No | No |
| Browser use | No | Under construction | Under construction | No | No | Yes |
| PDF support | Yes | Yes | No | Yes | Yes | Yes |
| Image generation | Yes | Yes | No | Yes | No | Yes |
| Custom API providers | Yes | Limited | No | No | No | Yes |
| Free usage | Yes | Yes | Yes | Yes | Yes | Yes |
| Chat with multiple tabs | Yes | No | Yes | No | No | No |
| Cost | €19 lifetime | $120+ / year | $239.88 / year Selected countries |
$144 / year | $228 / year | $144 / year |
Checked on April 12, 2026. Browser-extension workflow only. Some pricing is annualized from public monthly plans.
We probably already support your favorite model, from top-ranked models to budget-friendly options that help you spend less.
Ceres is strongest when the work is already happening in the browser. It stays tied to the page, uses context from your browser actions, and helps the user work with content in a direct, interactive way.
The same setup supports flagship, arena leader, and budget-friendly models, and it can also handle search on the internet, URL reading, PDF reading, voice input, and history overview inside the same workflow.
