Poe is the clear winner: 7.5/10 (B-tier) versus 6.5/10 (C-tier). Claude Mythos Preview isn't a bad tool, but on every category that drives the overall score, Poe comes out ahead. The tier gap is repeatable -- not methodology noise -- and the day-to-day experience reflects it.
On pricing, Poe starts free while Claude Mythos Preview requires a paid plan from day one (Invite only+). If you're testing the waters or running an occasional workload, that gap matters more than the score differential. Claude Mythos Preview starts at Invite only; Poe starts at $0. Compare what each entry tier actually unlocks before you compare list prices -- the limits matter more than the headline number.
By use case: pick Claude Mythos Preview when partner organizations in project glasswing doing cybersecurity research, defensive red-teaming, threat intelligence, or large-scale vulnerability triage. Pick Poe when ai power users who want to try multiple models without managing separate subscriptions for each one. The two tools aren't fighting for the same person -- they're aiming at adjacent jobs that occasionally overlap. If you're squarely in Poe's lane, the tier-list ranking and the use-case fit point the same direction; if you're in Claude Mythos Preview's lane, the score gap matters less than the fit.
Bottom line: Poe is the better tool for most people right now. Pick Claude Mythos Preview only when partner organizations in project glasswing doing cybersecurity research, defensive red-teaming, threat intelligence, or large-scale vulnerability triage -- that's its lane, and inside that lane it still earns its place.