Anthropic October valuation: 49% list vs 73¢ FAQ

Anthropic October valuation is the Polymarket bracket market for where Anthropic's private-market mark sits at end-October 2026, and the October 3 board shows a loud disagreement between the outcome-list percentage and the FAQ cent price on the same leading bucket.

What actually happened

Polymarket's event "Anthropic's valuation end of October 2026?" lists nine valuation brackets. On the October 3 fetch, the stacked header showed $1.50–$1.75T at 49%, $1.25–$1.50T at 40%, $2.00–$2.25T at 30%, and $1.00–$1.25T at 29%, among other tails. Drill-down rows on the same page showed Buy Yes prices that did not line up cleanly with those header percentages — including a 73¢ Yes on the $1.50–$1.75T row next to a 49% header chip. The FAQ then described the frontrunner as $1.50–$1.75T at 73%. That is an internal page disagreement, not a license for this desk to invent a midpoint.

CoinRithm's mirror on the same day printed a different leader entirely in its quality-warned snapshot: $1.00–$1.25T at 61%, while labeling other large brackets as having no observed price and marking data quality low. CoinRithm also warned "No live quotes." This article does not average CoinRithm's 61% with Polymarket's 49% or 73%. When mirrors diverge, attribute and move on.

Market Context on Polymarket showed the event opened Aug 24, 2026, with an Oct 31, 2026 end date and a Nasdaq Private Market NPM Price resolution source. An experimental AI blurb discussed revenue run-rate color and IPO chatter; that blurb is labeled experimental and is not used here as a hard fact set beyond what the odds board itself shows. Volume on the Polymarket chrome looked thin relative to big politics markets — thousands of dollars, not tens of millions — so treat the board as early and jumpy.

Lower brackets on the same Polymarket board printed under 1% or near 1% for sub-$1T outcomes on the October 3 fetch, while the $2.25T+ tail sat in single digits. Thin volume on several rows means a single clip can move a chip without proving a new fundamental mark. Readers should screenshot the board they cite, because this market is young enough that afternoon prints can disagree with morning ones without anyone "hacking" the page.

What Polymarket thinks

For the Anthropic October valuation form field, this desk follows the outcome-list leading print: $1.50–$1.75T at 49% (pm_yes=49). The FAQ's 73¢ language is reported as a conflicting on-page print, not blended. Readers should refresh the live event before citing either number in chat, because thin books move. A 49% header chip and a 73¢ Yes button on the same bucket is exactly the kind of UI mismatch that creates bad screenshots on social timelines.

This page is not OpenAI October valuation. Mixing lab names is how timelines get polluted. Adjacent AI product reading: Gemini 4 Argon and Decagon Voice 3. Primary sources: Polymarket's Anthropic valuation end of October 2026 event and CoinRithm's mirror page with its quality warning intact.

How NPM resolution works without overclaiming

Polymarket's rules, as mirrored on CoinRithm, say the market resolves to Anthropic's private market valuation measured by the NPM Price for the last trading day of the month, with boundary ties going to the higher bracket, and fallback timing if NPM is late. That is mechanical settlement language. It is not a forecast that Anthropic will IPO in October or that any bracket "should" win. Confidential filing rumors and model-release chatter belong in separate stories unless a primary desk pins them to a dated source you can open.

If NPM stops publishing, CoinRithm's reprint of the rules says the market can fall back to earlier NPM data plus public market capitalization after an IPO or direct listing. Edge cases like that are why you read Rules before size. None of that language is investment advice about Anthropic stock that does not publicly trade on a national exchange in the way a retail ticker does.

What to do as a reader

If you only need the headline, Anthropic October valuation still shows a leading $1.50–$1.75T lane at 49% on the outcome list while the FAQ prints 73¢ for the same bucket — do not average. Thin volume means the board can reprice fast. Nothing here is a suggestion to buy or sell shares. Not financial advice. DYOR, ser.