Anthropic IPO odds diverge across Polymarket contracts as valuation sentiment cools
Polymarket traders have cut to 42% the probability that Anthropic closes its first trading day above a $2 trillion valuation. The same platform prices a 91% chance the artificial-intelligence startup goes public by Nov. 30. The split reflects divergent sentiment on two distinct questions: timing versus valuation magnitude. Anthropic, a closely watched AI startup, has drawn heavy prediction-market volume tracking its path to public markets.
The 49-point gap between Anthropic's IPO timing odds and its valuation odds forces traders to pick which contract to trust. That friction raises costs and splits liquidity across two related questions, mirroring the venue-selection problem traders already face between Polymarket and Kalshi. For Anthropic itself, the divergence creates conflicting signals: near-certain timing paired with below-coinflip valuation confidence complicates any management response to market noise.
Traders betting on the full IPO picture must now construct a synthetic position across both markets, with no guarantee the spreads converge cleanly. The Nov. 30 deadline on the timing contract means any resolution will come fast, but the valuation contract may float unresolved for months if Anthropic delays or prices conservatively.
Joins a running pattern of split pricing across Polymarket and Kalshi on major tech IPOs, following the SpaceX retake and the Google-Anthropic model spread where traders must first forecast which venue's base is better calibrated before taking any directional view.