Anthropic has overtaken OpenAI in the enterprise large language model market.
A new report from Menlo Ventures shows Anthropic now holds 32% market share by usage among enterprises. OpenAI comes in second with 25%.
That’s a sharp turnaround from two years ago when OpenAI held 50% and Anthropic only 12%. 
Anthropic leads even more in enterprise coding models with 42%, more than double OpenAI’s 21% share.
The report credits Anthropic’s surge to its June 2024 release of Claude 3.5 Sonnet and the follow-up February 2025 launch of Claude 3.7 Sonnet. These releases boosted enterprise adoption sharply.
Enterprise developers reportedly prefer Claude over OpenAI’s ChatGPT, though OpenAI remains dominant in consumer use. OpenAI said last week its ChatGPT users send 2.5 billion prompts daily.
The Menlo report also found enterprises favor closed AI models like Anthropic’s and OpenAI’s. More than half said they don’t use open source models. As of mid-2025, only 13% of enterprise daily workloads use open source models, down from 19% at the start of the year. Meta still leads the open source AI market.
Anthropic now leads enterprise AI usage, flipping the landscape once ruled by OpenAI.
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