Thats pretty telling that on the search's / ad placement on the web where it matters, OAI has had no impact or its muted and offset by continued market power / increased demand for Google's ad-space on the web.
Also the switching cost. If its negligible theres no reason for Anthropic to be considered a going-concern in the long term. So its valuation makes no sense from a DCF basis unless you are expecting a liquidation in future. But even then, the liquidation value still doesn't justify its valuation today.