The Ramp AI Index indicates that Anthropic has overtaken OpenAI in enterprise adoption, reaching 42.4% of eligible businesses while OpenAI remained flat at 39.5%. Adoption rates for other models remain significantly lower, with Google at approximately 6%, xAI at roughly 3%, and DeepSeek at 0.3%. The data suggests that Chinese and open-source models currently have a minimal impact on the revenue and market share of leading enterprise AI providers.