Kimi K3 AI Plays Pokémon FireRed at a Quarter of Rival Model's Cost

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An experiment pitted Kimi K3 against Fable 5 in a 2,000-action run of Pokémon FireRed, with both models using the same game harness and Chinese ROM. K3 completed the run at roughly $0.008 per action compared to Fable 5's $0.037, making it about 4.5 times cheaper per action overall. However, K3 progressed significantly slower, reaching only the midpoint of Viridian Forest while Fable 5 had already earned the Boulder Badge and advanced to Route 3. A key weakness exposed during the run was K3's overwrite-style note system, which caused it to forget a completed story milestone and waste nearly $2 retracing steps to Pallet Town. The comparison suggests K3 reasons like a casual player relying on general story knowledge rather than detailed map memory, and that adding map-level memory could substantially improve its cost efficiency.

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