AI research lab Anthropic has become the top choice for enterprises, surpassing OpenAI in market share. According to a recent report from Menlo Ventures, Anthropic now holds 32% of the enterprise large language model market share by usage, while OpenAI follows with 25%. This marks a significant shift from just two years ago, when OpenAI dominated with 50% market share and Anthropic held only 12%.
Google has also seen growth in enterprise usage of its models over the past few years. However, Anthropic’s lead is even more pronounced in coding applications, where it commands 42% of the enterprise market share—more than double OpenAI’s 21%.
The surge in Anthropic’s adoption is largely attributed to the release of its Claude 3.5 Sonnet model in June 2024, which laid the foundation for its growth. The momentum accelerated further with the launch of Claude 3.7 Sonnet in February 2025.
Industry discussions align with these findings, suggesting that enterprise and startup developers increasingly prefer Claude over OpenAI’s ChatGPT. Despite this, OpenAI remains strong on the consumer side, with users sending over 2.5 billion prompts daily to ChatGPT.
The Menlo Ventures report also highlights enterprise preferences for closed models, like those from Anthropic and OpenAI. More than half of enterprises surveyed do not use open-source models at all. Only 13% of enterprise daily workloads rely on open-source models as of mid-2025, down from 19% at the start of the year. Meta continues to lead in the open-source market.