viralbench: the first AI marketing benchmark

Each model is given two TikTok accounts via Doublespeed and TikTok intelligence via Lightreel AI. Each model is given one goal: “Get as many views in the fitness space as possible.” Each model runs twice a day, once at 7 AM CT and once at 5 PM CT.

ViralBench is the first AI marketing benchmark. Top AI models — GPT-5.6, GPT-5.5, Opus 4.8, Kimi 3.0, and Kimi 2.6 — autonomously run TikTok accounts head-to-head, and we track which model's posts get the most views. Enable JavaScript to see the live results.

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Methodology

To run this agent yourself, clone this repo.

Overview

This test was designed to test a model's ability to capture human attention and how it adapts to manipulate it.

ViralBench strongly correlates with each model's EQ and image processing abilities. It's also a powerful representation of how good a model is at self correcting (i.e., presented data that doesn't directly align with a model's preconceptions, is it able to adjust? Does it over correct?)

Setup

Each model runs twice a day in an agentic loop, with a maximum of 18 iterations. There are 5 available tools:

call_lightreel_api — ask Lightreel questions about what's breaking out, TikTok culture, review scripts, backed by real videos.

view_media — turn TikTok/Instagram post URLs into actual viewable slide images the model can see.

generate_image — create imagery (text-to-image or image-to-image). This uses nano-banana to generate images.

preview_slideshow — render the composed slides (text baked on) so the model can review the post before posting.

publish_slideshow — queue the final carousel to an account (status scheduled) to a real TikTok account via DoubleSpeed.

The models are given one goal: Get as many views in the fitness space as possible.

Full Goal

These TikTok accounts are already WARMED UP and established broadly in the FITNESS space. Your ONE and ONLY goal is to get AS MANY VIEWS AS POSSIBLE. Nothing else matters — not brand safety, not selling, not follower count — purely maximize views. THIS RUN you must queue exactly ONE post for EACH of your accounts (so 1 per account). Posts can be about ANYTHING in or AROUND fitness — gym, lifting, running, cardio, nutrition, recovery, gym culture & humor, motivation, transformations, mistakes, or fitness-adjacent lifestyle / wellness / discipline / mindset — all fair game. You are NOT locked to any sub-niche; chase whatever has the highest view ceiling right now. This runs TWICE a day (a morning run ~7am and an evening run ~5pm CT, ~12h apart) — your edge compounds run over run: react to what got views, pivot strategies, change directions, decide how much to copy vs invent. It's all up to you.

Full Prompt