Anthropic is an AI safety company founded by former OpenAI executives Dario and Daniela Amodei, known for developing Claude, a large language model. The company has raised multiple funding rounds from major institutional investors at multi-billion-dollar valuations. This market trades whether Anthropic's market capitalization will be below $100 billion at market close on its IPO day, with resolution by December 31, 2027. A public offering would establish a market-determined valuation based on opening-day trading. The current odds of 1 percent YES reflect market participants' assessment that Anthropic will reach at least a $100 billion valuation in public markets. This pricing is consistent with historical precedent: recent AI-focused companies and tech startups valued in private markets at $20-50 billion have entered public markets at substantially higher valuations. The resolution mechanism is straightforward: if Anthropic completes an IPO by the deadline, the market capitalization at close of IPO day determines the outcome. If no IPO occurs by December 31, 2027, the market resolves according to platform rules. Currently, this market shows limited trading volume, typical for long-dated, speculative technology event predictions.