Arca, a desktop app from the team behind Brevis, is now open to everyone on Mac and Windows, paying users for AI sessions they choose to submit and that are approved. Users can sign up with an email address or Google account without an invite or waitlist, according to BeInCrypto, and approved sessions are paid weekly. The free app finds session histories from tools including Claude Code, Codex, Cursor and Claude Desktop; users select sessions to submit, and Arca removes names, file paths, account details and keys on the device before upload. Nothing uploads in the background, and users can withdraw before sending a session for review. Sessions with Claude Opus and Fable, as well as the latest GPT models in Codex, qualify; very short sessions do not. Connecting GitHub is optional and can strengthen a user profile, potentially increasing session value. Arca began invite-only early access on October 13. Through November 30, its Launch Challenge offers $10,000 in prizes in addition to regular payouts.