> ## Content Index
> Fetch the complete content index at: https://www.medianexis.com/llms.txt
> Use this file to discover other available public pages before exploring further.

# Meta rolls out LLM-based ad ranking, scoring every impression in real time
- URL: https://www.medianexis.com/meta-rolls-out-llm-based-ad-ranking-scoring-every-impression-in-real-time/
- Published: 2026-10-29T14:01:12.000Z
- Updated: 2026-10-29T14:01:12.000Z
- Description: AdExchanger’s Allison Schiff reports Meta is rolling out three ad-ranking upgrades: a new GenRecs model built on LLMs, a bigger GEM foundation model, and a retrieval overhaul letting Andromeda score over a billion ads per second.
- Author: The Signals Desk
- Tags: Ad-tech, AI, Allison Schiff, Meta's new LLM-based ad ranking system

**Why it matters.** Buyers lose leverage from manual audience targeting as Meta’s models automate segment selection faster and with more precision than a spreadsheet.

*Signal from* [*adexchanger.com*](https://adexchanger.com/?ref=medianexis.com) *·* [*Allison Schiff*](https://www.medianexis.com/tag/by-allison-schiff/) *·* [*read the original*](https://www.adexchanger.com/ai/meta-has-a-new-ad-ranking-system-built-on-llms-plus-upgrades-to-andromeda-and-gem/?ref=medianexis.com)*.*