Praex
Praex is an AI copartner built on its own in-house models—Velox II, Faber II, and Lucia II—accessible from the terminal, phone, and web with a shared session and memory. It is a fork of opencode (MIT-licensed) and can also run on any model if you bring your own keys.
Key facts
What is Praex?
One AI copartner with the same agent, memory, and session across terminal, phone, and web—running on Praex's own models rather than someone else's API.
Who is Praex best for?
Developers, technical users, and individuals who want an everyday AI copartner for chat and coding tasks
Does Praex have a free plan?
According to official sources, a free plan is available. Official pricing
What does Praex cost?
Verified starting price is USD 20 / month. View source
What are its main limitations?
- Lucia II (Max) is not yet open—Max 'opens soon'
- Faber II only wakes on demand for Pro subscribers
- macOS is the only desktop download explicitly listed
- No team or enterprise tiers mentioned
Limitations are based on product materials or editorial synthesis; confirm on the official site.
When was this information verified?
October 20, 2026
Sources
- Official homepageofficial homepage · Oct 20, 2026
- Official pricingofficial pricing · Oct 20, 2026
Key features
- ✓Own models served on Praex-controlled infrastructure with no third-party API middleman
- ✓Three models: Velox II (free, everyday), Faber II (Pro, larger reasoning), Lucia II (Max, frontier)
- ✓Same agent, memory, and session across terminal, phone, and web
- ✓Open source: a fork of opencode (MIT)
- ✓One-line CLI install via curl -fsSL https://praex.ai/install.sh | bash
- ✓Manual mode agent that reads files, runs bash/tests, and edits source code
- ✓Bring your own keys or hardware to run Praex on any model, free
- ✓No sign-up required to start chatting
Use cases
- →Ask Praex a question in the chat without creating an account
- →Take a failing deploy and fix it: read cloudbuild.yaml, run npm test, edit src/router.ts
- →Start a task in the terminal, steer it from your phone, and review it on the web
- →Use Velox II free every day for instant answers and quick edits
- →Upgrade to Pro for Faber II when you need serious coding and reasoning with room to think
- →Run Praex with your own model keys or on your own hardware
Pricing
Free
$0
- · Velox II free every day
- · Use in the chat and in your terminal
- · No sign-up to start
- · Bring your own keys to run Praex on any model, free
Pro
$20/mo
- · Faber II, the larger model, wakes on demand
- · Five times the daily allowance
Velox II is free every day; Praex Pro is $20 a month, and the Max tier with Lucia II opens soon.
Pros
- +Free daily use of Velox II in chat and terminal
- +Same session and memory across terminal, phone, and web
- +Models are tuned and served in-house rather than resold from another API
- +Open source fork of opencode under MIT
- +Option to bring your own keys or hardware
Cons
- −Lucia II (Max) is not yet open—Max 'opens soon'
- −Faber II only wakes on demand for Pro subscribers
- −macOS is the only desktop download explicitly listed
- −No team or enterprise tiers mentioned
Positioning
- Core value: One AI copartner with the same agent, memory, and session across terminal, phone, and web—running on Praex's own models rather than someone else's API.
- Ideal for: Developers, technical users, and individuals who want an everyday AI copartner for chat and coding tasks
- Product type: Web app, terminal CLI, macOS download, phone
Frequently asked questions
What is Praex?
Praex is an AI copartner that runs in your terminal, on your phone, and on the web, powered by Praex's own models (Velox II, Faber II, and Lucia II) rather than a third-party API.
How much does Praex cost?
Velox II is free every day in the chat and terminal. Praex Pro is $20 a month, which includes Faber II with on-demand wake and five times the daily allowance.
Do I need to sign up to use Praex?
No—there is no sign-up to start. You can press Enter in the chat and Velox II answers.
Is Praex open source?
Yes. Praex is an open source fork of opencode under the MIT license.
Can I use my own model keys with Praex?
Yes. Praex says you can bring your own keys or hardware and run Praex on any model, free.
How do I install the Praex CLI?
Install it with the one-line command: curl -fsSL https://praex.ai/install.sh | bash. A macOS download is also available.
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