October release wave preview: Gemini 4 Pro checkpoints flicker on Arena

zcw @zwb44Originally posted 2026.09.28

Open original on X

october is going to be bigger than september > openai devday tuesday > sonnet 5.5 reportedly the same day > gemini 4 pro checkpoints appearing and disappearing on arena (yes gemini…) > fable 5.5 rumoured > haiku 5.5 somewhere in there > astra 6.1? devday will be a big pivot point for openai, i hope