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Praex is an AI copartner designed to help users ask questions complete tasks and perform serious software development work. It runs on models developed and served by Praex rather than relying exclusively on another company API. Users can access Praex through the web a terminal application and a phone experience with Remote Control for following and approving tasks. The platform supports coding workflows such as reading project files running tests editing code and fixing deployment problems. Praex includes Velox III as its free everyday model with a 128k context window. Faber II is a larger model intended for more demanding coding and reasoning tasks and is available through the Pro plan. Lucia II is described as a frontier level model with availability planned for the future. Users can bring their own API keys or hardware and run Praex with any model. The terminal tool is based on a fork of opencode released under the MIT license. Praex requires no sign up to start chatting and offers a free daily tier. Praex Pro costs 20 dollars per month and provides Faber II access with five times the daily allowance.