
Chart and changes show stored historical probabilities, not the selected live book.
Trends
Selected row: book midpoint. Other rows: stored references, possibly normalized; 24h changes use stored history.
Venue terms
Source: Polymarket
Informational venue terms only; CoinRithm paper trading uses its own rules.
Market depth · Anthropic
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Related Markets
Related questions for context, not a comparison of equivalent contracts.
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OpenAI IPO Closing Market Cap
Rules
This market will resolve to "Anthropic" if Anthropic completes an Initial Public Offering (IPO) before OpenAI completes an IPO by December 31, 2027, 11:59 PM ET, as confirmed by official company announcements and credible news sources.
2 venues currently price this market. CoinRithm's cross-venue reference probability for Anthropic is 94%. The venue spread is about 3 percentage points.
CoinRithm reference Anthropic 94% · 2 venues · 3 pt venue spread
Free JSON for this market, no API key needed:
https://api.coinrithm.com/api/prediction-markets/events/polymarket/will-anthropic-or-openai-ipo-firstAI agents: call pm_data_event on the CoinRithm MCP server:
https://mcp.coinrithm.com/mcp+9 more outcomes
+7 more outcomes
+18 more outcomes
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