GPT-6 Astra vs Opus 5.5: Two Frontier Models Play Unciv Head-to-Head

Angaisb_ · x · 2026-09-27

User Angaisb shared a video of OpenAI's GPT-6 Astra playing the open-source Civilization-like strategy game Unciv against Anthropic's Opus 5.5, crediting the idea to Peter Gostev, who has more model-vs-model game experiments on his profile. A fun way to compare frontier models' planning and reasoning.

Related event: GPT-6 Astra Faces Opus 5.5 in Unciv Strategy Game Match(2 posts)→

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