AIBearisharXiv – CS AI · 3h ago7/10
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Do LLMs Favor Their Providers? Measuring Vertical Integration Bias in Code Generation
Researchers have identified and measured Vertical Integration Bias (VIB) in LLMs, where AI models affiliated with specific providers generate code favoring their provider's ecosystem over comparable alternatives. The study found significant bias in direct code generation (up to +18.8 percentage points) that amplifies dramatically in agentic workflows (up to +39.2 pp), raising concerns about vendor lock-in and reduced developer autonomy.