Praxel

Praxel Arena ( https://arena.praxel.in ) is an AI-native skill credentialing platform where business professionals prove their skills through 30-second micro-interactions, not month-long courses or $10K certifications. Users swipe through AI-generated cards (spot-the-signal, forced tradeoffs, rank-and-prioritize) that test business judgment across six cognitive dimensions. Every response is evaluated by Claude in real-time with per-dimension scoring and personalized feedback. Three modes: Learn (drills with teaching moments), Practice (timed sprints with AI debriefs), and Compete (head-to-head duels with chess-style Elo ratings and side-by-side radar comparisons). Opus 4.6 is the entire testing infrastructure. It generates assessments across 24 business topics, evaluates nuanced judgment with dimensional scoring, powers duel adjudication comparing two professionals side-by-side, and conducts Socratic voice coaching via ElevenLabs.