GPT-5.6 Sol matches Claude Fable 5 at 1/3 the cost
sanmikoyejo · x · 2026-08-28
The Cost Pareto frontier shows GPT-5.6 Sol performing strongly on the high-performance end, matching Claude Fable 5 at less than a third of the cost ($4.2k vs $14.2k). On the Token frontier, Kimi K3 leads the low-token end, while Claude Fable 5 and Opus 5 lead the high-performance end. Only Kimi K3 and Claude Opus 5 appear on both frontiers. Zhipu's GLM-5.3 leads all open-weight models at 8.1%.
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