Anthropic $2.5T Valuation Odds Halve as Investors Weigh $1.5T IPO

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Anthropic's $2.5T Valuation Odds Fall to 24% After Reuters Reports IPO Investors Weighing ~$1.5T

Anthropic now looks less likely to hit a $2.5 trillion valuation by December 31, with Polymarket's "Will Anthropic's valuation hit __ by December 31?" market at 24% for the $2.5T outcome on Oct. 17. On Oct. 15, Reuters reported that some current and prospective IPO investors are weighing about $1.5 trillion, down from the roughly $2 trillion previously expected for the November share sale. Reuters attributed the cut to slowing sequential revenue growth after an Oct. 14 investor day in San Francisco.

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Will Anthropic’s valuation hit __ by December 31?

Each outcome's chance, from what traders are paying right now on Polymarket and Predict.fun.

↑$2.5TIn this story

24%

PolymarketBest price4.00x25¢Predict.fun3.72x26.9¢

↑$2.0T

61%

PolymarketBest price1.64x61¢Predict.fun1.59x62.8¢

↑$3.0T

17%

Predict.funBest price5.92x16.9¢Polymarket5.26x19¢

↓$600B

3%

Predict.funBest price32.26x3.1¢Polymarket22.22x4.5¢

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The ↑$2.5T outcome fell from 46% to 24% over three days, a drop of 22 percentage points, and the 24% reading on Oct. 17 was its low for the period. The growth figures behind the report: Q3 revenue rose 45% to $16.8 billion from $11.6 billion in Q2, after climbing more than 140% from Q1 to Q2. Reuters said Anthropic is profitable on an adjusted basis, and cited a broader AI-stock selloff and concerns about the cost of financing AI infrastructure. The Telegraph framed the shift as a $500 billion cut. Reuters describes investors as weighing the lower figure; no price has been set.

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What the Three-Day Drop in the Anthropic $2.5T Market Shows, and What Could Reverse It

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The arithmetic explains the size of the gap. A $1.5 trillion valuation sits $1 trillion short of the $2.5 trillion threshold, and even the earlier $2 trillion expectation fell $500 billion below it. A YES outcome at 46% therefore already required a large premium over the expected IPO price, likely from first-day trading, and the Reuters figure widened the distance that premium would need to cover. The sources document the investor discussion and the growth slowdown but do not establish that the Reuters story alone drove the full 22-point move.

The strongest sourced counter-case comes from an early backer quoted by Fortune, who predicts an IPO priced around $1.8 trillion with trading value reaching $2.3 trillion to $2.4 trillion. Even that bullish scenario stops short of $2.5 trillion. Timing adds risk: Reuters reported on Oct. 14 that the debut could slip until after the November midterms, which shrinks the window before the December 31 deadline.

The next milestone is a formal price range and any updated revenue disclosure in Anthropic's public filing. A range near $2 trillion or evidence of re-accelerating growth would challenge the repricing; a range near $1.5 trillion would confirm it. No filing date was confirmed in the Reuters reporting. Track live prices on the Anthropic valuation by December 31 market page.