AppZen Introduces ZenLM Plus Models for Expense Audits

In a press release, AppZen introduced ZenLM Plus, a family of finance specialized language models for expense auditing. The models are available to select customers through AppZen Expense Audit, with general availability planned for December 2026.

In AppZen's benchmark against seven frontier models, ZenLM Plus led five of six audit control comparisons. It recorded an F1 score of 97.4 across targeted policy category cases, compared with 88.3 for GPT-5.6 Sol, the strongest competing result in that test. Gemini 3.1 Pro and Sonnet 5 performed slightly better on receipt verification.

ZenLM Plus covers policy decisions, receipt validity, transaction verification, documentation requirements, itemization and duplicate detection across expense reports. AppZen said its Mastermind platform can route each task to a ZenLM Plus model, deterministic logic or a frontier model based on the control being evaluated.