Mar 17, 2026 - Mar 20, 2026, Anthropic surged from 43.5c to 57c, while OpenAI dropped from 16.5c to 12c and Google fell from 24.5c to 15.5c. This reflects the market cementing Claude 3.5's arena dominance and a collapse in confidence regarding a pre-June GPT-5 release, driving capital consolidation into Anthropic.
Mar 14, 2026 - Mar 17, 2026, OpenAI declined from 21c to 16.5c, while Anthropic rose from 36c to 43.5c. Expectations for OpenAI to reclaim the top spot shortly began to crumble, shifting bets toward the current performance leader and favorable tiebreaker rules.