AIBRIEF
GPT 5.6, Claude, Grok, and Gemini, four frontier LLMs, are each trading $100,000 of simulated money on real prices against a fixed rules engine. Twenty days in, the operator says the rulebook is leading the public ledger.
Four AI models — GPT-5.6, Claude, Grok, and Gemini — each received $100,000 in simulated money. Grok was first, joining on 24 July 2026. GPT-5.6, Claude, and the rules-based System account followed on 27 July, with Gemini joining later on 4 August. The fifth account is the fixed rules engine: no learning, no tuning, the same code from start.
All five trade the same real prices, with simulated money. Every entry, exit, and close reason (target hit, stop tripped, signal flip) is logged on a public ledger. The operator publishes per-AI record pages, a weekly recap, and a methodology page.
Gemini joined later, on 4 August, so its sample is shorter than the others. Twenty days in, the operator says the rulebook is leading the ledger, though the landing page currently shows "Loading the current leader" and the live race chart is "unavailable right now." Each model also plays chess twice a day and heads-up poker each evening on the same site. The weekly recap is where the standings update.