Report Suggests OpenAI Has Clawed Tons of Market Share Back From Anthropic in 2026

A report based on data from OpenRouter, and seen by the Wall Street Journal, shows that OpenAI has made what looks like massive progress in its effort this year to contend with Anthropic’s dominance in coding and productivity—the sort of tasks that involve enterprise customers buying compute on a massive scale. At the beginning of 2026, OpenAI’s share was less than 25%. Last month, it was nearly 50%, according to the report. OpenRouter is a company that automatically routes compute from AI companies to a user based on whatever attributes they’re seeking to optimize for, like price and performance. Imagine a routing service for all the streaming services that automatically picks a source for the movie you want based on, say, whether it’s the highest resolution, or whether it’s the…