According to a report published by Menlo Ventures on July 31, Anthropic currently occupies 32% of the enterprise LLM market share in terms of usage. OpenAI has the second-largest market share by usage among enterprises, with 25%.
The figure represents a significant shift from the situation just a few years ago. According to the report, OpenAI has experienced a significant decline in its market share among enterprises since 2023, while Anthropic has consistently increased over the same period.

Two years ago, OpenAI possessed 50% of the enterprise market share by utilization, while Anthropic held 12%.
Google has also observed an increase in the use of its models in the enterprise over the past few years.
Anthropic holds the highest market share in the enterprise market, with 42%. When it comes to coding, Anthropic’s AI models are utilized by enterprises at a rate that is more than double that of OpenAI, which accounted for 21% of the overall market share.

According to the report, the company’s surge in utilization was set in motion by the anthropopic release of its Claude Sonnet 3.5 model in June 2024. The momentum was further bolstered by the publication of Claude Sonnet 3.7 in February 2025.
The findings from Menlo Ventures are consistent with anecdotal commentary in the industry, which indicated that enterprise and startup developers preferred Claude over OpenAI’s ChatGPT.

Conversely, OpenAI maintains a robust presence in the consumer sector. Last week, the organization disclosed that its users transmit over 2.5 billion prompts to ChatGPT on a daily basis.