大模型年中报告：Anthropic 市场份额超 OpenAI，开源模型企业采用率下降

Core Insights - The foundational large models are not only the core engine of generative AI but are also shaping the future of computing [2] - There has been a significant increase in model API spending, which rose from $3.5 billion to $8.4 billion, indicating a shift in focus from model training to model inference [2] - The emergence of "code generation" as the first large-scale application of AI marks a pivotal development in the industry [2] Group 1: Market Dynamics - Anthropic has surpassed OpenAI in enterprise usage, with a market share of 32% compared to OpenAI's 25%, which has halved from two years ago [9][12] - The release of Claude Sonnet 3.5 in June 2024 initiated Anthropic's rise, further accelerated by subsequent releases [12] - The code generation application has become a killer app for AI, with Claude capturing 42% of the market, significantly outperforming OpenAI's 21% [13] Group 2: Trends in Model Adoption - The adoption of open-source models in enterprises has slightly declined from 19% to 13%, with Meta's Llama series still leading [17] - Despite the continuous progress in open-source models, they lag behind closed-source models by 9 to 12 months in performance [17][20] - Developers prioritize performance over cost when selecting models, with 66% opting to upgrade within their existing supplier ecosystem [24][27] Group 3: Shift in AI Spending - AI spending is transitioning from model training to inference, with 74% of model developers indicating that most of their tasks are now driven by inference, up from 48% a year ago [31]