Analyzing the Cost Reduction Behind GPT-5.6
haider1 · x · 2026-07-16
A thread analyzes the reasons behind the cost reduction of GPT-5.6, pointing to a massive drop in inference token consumption. At lower reasoning intensities, GPT-5.6 uses only 1/5 of the original token count, reducing overall costs by almost 10x. Additionally, based on throughput estimates, the Fable 5 model size might be roughly twice that of GPT-5.6, though serving costs don't scale directly with model size.
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