Gemini 3.1 Pro at temperature 0.0 outputs "na-na-na-na", puzzling devs

teropa · x · 2026-09-18

Developer teropa found that Gemini 3.1 Pro, when run at temperature 0.0, outputs nonsensical "na-na-na-na" text — contrary to the expectation that temperature 0 should give deterministic, stable outputs. The post includes a reproduction screenshot, and the oddity raises questions about the stability of the model's sampling stack.

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