OpenAI — Enterprise Market Share: 25%

NoteThe source directly confirms the exact claim. The Menlo Ventures 2025 Mid-Year LLM Market Update states: 'By the end of 2023, OpenAI commanded 50% of the enterprise LLM market, but its early lead has eroded. Today, it captures just 25% of enterprise usage—half of what it held two years ago.' The report also confirms Anthropic rose to 32%. The claim's exact stored value (25) matches the source's stated percentage (25%), the time period matches (2025-07 aligns with the July 31, 2025 publication date and the June 30-July 10, 2025 survey period), and the context about the halving from 50% and Anthropic's rise to 32% is all corroborated.