Enterprises prefer Anthropic’s AI models over anyone else’s, including OpenAI

AI research lab Anthropic has surpassed OpenAI to become the leading large language model provider for enterprises, securing 32% of the market share compared to OpenAI's 25%, a significant reversal from OpenAI's 50% share two years prior, according to a Menlo Ventures report. This rapid ascent, largely driven by the strong performance of Anthropic's Claude 3.5 Sonnet and 3.7 Sonnet models, is particularly evident in enterprise coding, where Anthropic holds a 42% market share versus OpenAI's 21%. The report also indicates a broader enterprise preference for closed AI models, a trend benefiting Anthropic's growth in the crucial business AI segment, even as OpenAI maintains a strong foothold in the consumer market.

Analysis

The enterprise generative AI market is experiencing a significant competitive realignment, with a Menlo Ventures report indicating Anthropic has surpassed OpenAI as the market leader. Anthropic now commands 32% of enterprise large language model (LLM) usage, a stark reversal from two years prior when it held just 12% against OpenAI's dominant 50% share, which has since fallen to 25%. This rapid ascent is directly attributed to the successful launches of Anthropic's Claude 3.5 and 3.7 Sonnet models. The company's advantage is particularly pronounced in the high-value enterprise coding segment, where its 42% market share more than doubles OpenAI's 21%. While OpenAI maintains a strong foothold in the consumer market, processing over 2.5 billion daily prompts, the enterprise segment shows a clear and growing preference for closed models, with usage of open-source models in daily workloads declining from 19% to 13% in the first half of 2025. This trend benefits Anthropic and also Alphabet's Google, which has seen its enterprise model usage increase, but presents a headwind for Meta, which dominates the contracting open-source enterprise space.

Key Decisions for Investors

• Investors should recognize that the generative AI market, particularly the lucrative enterprise segment, is highly dynamic and not a winner-take-all environment, as evidenced by Anthropic's rapid displacement of OpenAI's leadership.
• For investors in Alphabet (GOOGL), the report confirms its growing traction in enterprise AI but also highlights Anthropic as a formidable new competitor whose market share gains must be monitored closely.
• Given the reported enterprise shift away from open-source models, investors in Meta Platforms (META) should critically assess the company's strategy for monetizing its open-source AI leadership within the enterprise vertical, as this trend could limit its market potential.
• The data suggests product-specific advantages, such as Anthropic's strength in coding, are key differentiators; therefore, portfolio allocations within the AI sector should favor companies that demonstrate clear product-market fit in valuable, specialized enterprise use cases.