OpenAI Surpasses Anthropic in OpenRouter Weekly Model Spending for First Time in 2 Years

OpenAI has surpassed Anthropic in weekly model spending on OpenRouter, according to a recent report by Blockvites citing OpenRouter's weekly expenditure data. The data shows OpenAI overtook Anthropic during the week ending September 7, 2026, marking the first time since February 2024 that it has led in this metric after a gap of approximately two and a half years.

Astra accounted for about 19% of combined spending between the two companies. The weekly expenditure figures are based on the amount users spent through OpenRouter on each model, not token processing volume. OpenRouter's model rankings reflect platform-throughput usage, but do not represent overall market share including direct API usage by companies.