GPT-5.6 Agent Beats Deck-Building Game

emollick · x · 2026-07-11

Calling it an "AI threshold" moment, the author had GPT-5.6 Sol control a computer via Codex to attempt the daily challenge in Slay the Spire 2. With randomly generated levels that rule out cheating, the agent had to rely entirely on continuous decision-making. The agent ran for 5 hours, navigating complex game choices to successfully clear the run and win.

Related event: GPT-5.6 Beats Card Game Challenge via Computer Control(3 posts)→

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