efficient AI answer engine + agent

Ask anything. Or let Lumen do it.

🛠 Agent 🔬 Deep research 🗂 Spaces 🔌 MCP 📊 Empire
🗂 SpacesPersistent workspace: standing instructions + pinned files apply to every chat inside it.

🛠 Agentic mode

Turn on the agent and Lumen plans steps, runs connectors, then reports back. Free to try.

🎛 Pick your model

Efficient free models for everyone; Pro unlocks Opus, GPT-4o, Grok and Gemini.

⚡ Free → Pro → Max

Start free. Upgrade when you need more.
See plans →

FAQ

Is Lumen free?

Yes. Lumen has a Free tier (fast, efficient models) and a $20 Pro tier that unlocks deeper answers, more sources, and access to Opus, GPT-4o, Grok and Gemini. See Pricing.

What does "agentic mode" mean?

Turn on the agent and Lumen plans multi-step work, runs connectors, and reports back -- instead of just answering a single question.

Can Lumen work with my own files or browser?

Yes -- Connect local files lets the agent work with files on your own computer, and the browser extension runs the agent in your own browser.

Is Lumen's output reliable?

Lumen is AI and can be wrong -- verify important information. It is not legal, financial, medical, or professional advice. See Terms and Privacy.

Lumen is AI and can be wrong. Verify important information. Not legal, financial, medical, or professional advice. · Terms · Privacy
Drop a file — Lumen will read it and act on it