It has been reported that two weeks ago, Gemini 3 Pro and 2.5 Pro were raced within the same "Gemini Plays Pokemon" environment. As a result, 3 Pro became the champion of the Johto region without a single defeat.
Gemini 3 Pro Overwhelms 2.5 Pro in Pokémon Crystal Challenge, Showing Clear Gap in Long-term Task Processing
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Meanwhile, 2.5 Pro aimed to acquire its fourth badge but reportedly entered a long loop at Oliver's Lighthouse before finally managing to break free.
This difference is said to stem from differences in their behavioral patterns as agents. 3 Pro reportedly took actions to break out of loops rather than being bound by constraints. While 2.5 Pro showed a tendency to repeat input errors, 3 Pro made judgments closer to those of a human.
Although both models shared a dedicated set of tools, 3 Pro appeared to progress through the game by developing its own strategies without relying on "training wheel" style auxiliary functions.
Sources: Gemini 3 Pro vs. 2.5 Pro in Pokemon Crystal (HN 315pt, 92 comments) (HN Search (backfill), 2025-12-16)