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Does 80% of 256k perform the same as 80% of 1M+?

This story is from 2026-09-11. It is preserved in the archive; the latest stories are on the live feed.

Hey everyone, I’m using GPT-6 Astra in the desktop app for studying and exam prep. My question: Does 80% utilization of a 256k window (~200k tokens) perform similarly in retrieval and formatting accuracy to 80% of its max 1.05M window (~840k tokens)? Does context degradation scale strictly by the p…

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  1. 2026-09-11 07:44 · r/OpenAI
    Does 80% of 256k perform the same as 80% of 1M+?

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