Pricing
Straightforward pricing
Start on the free tier. Upgrade to Pro when you want higher limits and priority access to frontier models. Cancel anytime.
Free
For getting started and everyday questions.
$0forever
Start free- A generous daily message allowance
- A strong default model
- Saved conversation history
- Markdown, code, and math rendering
- Priority access to frontier models
- Longer context windows
Most popular
Pro
For daily, serious use.
$18per month
Go Pro- Everything in Free
- Higher daily limits
- Priority access to frontier models
- Longer context windows
- Early access to files and tools
- Email support
Usage limits keep the free tier sustainable, since Lumen pays for every model call. If you hit a limit, Lumen tells you before you run out.
Billing questions
- Is my data private?
- Your account and conversations sit behind authentication and stay tied to your account. Lumen does not sell your data.
- How much does Lumen cost?
- Lumen has a free tier and a Pro plan at $18 per month. The free tier covers everyday use, and Pro adds higher limits and priority model access.
- Do I need to install anything?
- No. Lumen runs in your browser. You sign in and start a conversation. There is nothing to download.