OpenAI RSI blog data: 124x more tokens yield maybe 10% faster AI capability gains

sebkrier · x · 2026-09-13

Ramez strings together numbers from OpenAI's recent RSI blog post to illustrate diminishing returns: a 124x increase in token output led to only a 7x increase in lines of code, which led to a 1.6x increase in experiments run. Based on power-law extrapolation, he estimates this translates to perhaps just a 10% increase in the AI capability improvement rate.

The thread argues that massive compute and output gains shrink dramatically as they pass through each layer of the R&D pipeline. While the final figure is the author's own extrapolation, the underlying data comes from OpenAI's official post, giving the scaling-diminishing-returns debate a concrete quantitative anchor.

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