# GEM Training: How Meta Doubled the Efficiency of Its LLM-Scale Ads Foundation Model

> Source: <https://engineering.fb.com/2026/08/03/ml-applications/training-gem-at-llm-scale-meta-ads-recommendation-foundation-model/>
> Published: 2026-08-03 18:00:17+00:00

Meta’s Generative Ads Recommendation Model (GEM), the foundation model behind ads recommendations across Instagram and Facebook, now trains at LLM scale on several thousand of the latest-generation GPUs. This post goes into the details on how we achieved: doubling end-to-end (E2E) training efficiency to 20–25% Model FLOPs Utilization (MFU) while scaling training FLOPs 4x in [...]

The post [GEM Training: How Meta Doubled the Efficiency of Its LLM-Scale Ads Foundation Model](https://engineering.fb.com/2026/08/03/ml-applications/training-gem-at-llm-scale-meta-ads-recommendation-foundation-model/) appeared first on [Engineering at Meta](https://engineering.fb.com).