Reasoning
Chain-of-thought that holds across long contexts without losing the thread.
Lumen 2 · now in research preview
The AI that
thinks with you.
A frontier model that reasons, sees, writes code, and gets things done — quietly, in the background of your day.
Trusted by teams at
StripeNotionFigmaLinearVercelShopifyAnthropic
Capabilities
One model.
Every kind of work.
Vision
Reads charts, screenshots, handwriting.
Code
Writes, reviews, ships.
Tools
Browses, runs code, calls APIs.
Memory
Remembers your projects, your style, your quirks.
Voice
Speaks 40+ languages fluently.
How it works
From a thought to a finished thing.
01
Ask
Type, speak, or share a screen. No prompt engineering required.
02
Think
The model reasons step by step, showing its work.
03
Act
It writes files, runs code, browses the web, books your flight.
04
Ship
You approve, iterate, or hand it off. It's yours.
In the wild
Built for the work you actually do.
Lumen reads the room — your codebase, your docs, your last 200 messages — and quietly does the thing you'd otherwise put off until tomorrow.
- → Drafts the spec, then the PR, then the release notes.
- → Reads your spreadsheet and tells you what's actually broken.
- → Researches for 20 minutes so you don't have to.
- → Runs in the background. Pings you only when it matters.
live session
Refactored 14 files · ran 38 tests · opened PR #482
Try Lumen.
It only takes a sentence.
Free during the research preview. No credit card. No setup.