Multiple outlets report that OpenAI posts $5.7 billion in first-quarter revenue, putting it roughly $1 billion ahead of Anthropic. The Economic Times frames the difference as OpenAI holding a $1 billion revenue lead over Anthropic during the quarter. Seeking Alpha similarly states that OpenAI leads Anthropic by about $1 billion, citing OpenAI’s $5.7 billion Q1 figure. Taken together, the reports indicate that both companies are generating billions in quarterly revenue and that OpenAI’s topline is modestly higher than Anthropic’s in this period. While the sources align on the size of OpenAI’s Q1 revenue and the approximate gap between the two firms, they do not provide additional detailed breakdowns in the provided text, such as specific product drivers, regional performance, or margins. Overall, the shared message is a measurable revenue gap in Q1, with OpenAI at $5.7 billion and Anthropic trailing by around $1 billion.