Anthropic’s IPO market cap odds cluster tightly around the $1.25–1.75 trillion bands because the company’s October S-1 and subsequent roadshow updates show third-quarter revenue reaching roughly $17 billion—more than twelve times year-earlier levels—while adjusted operating margins improved to the mid-teens. Traders are pricing in continued hyper-growth against $895 billion in non-cancelable compute and infrastructure commitments, plus non-cash valuation charges that produced large reported net losses. The implied probability distribution has narrowed from earlier $2 trillion talk as comparable deals such as SpaceX’s $1.75 trillion IPO and OpenAI’s recent $1.25 trillion funding round set clearer precedents, with the $1.5 trillion midpoint now viewed as the most likely clearing level once pricing is finalized before Thanksgiving.