Our digital billboards across San Francisco now feature our Artificial Analysis Intelligence Index vs. Cost per Task chart, plotting the Intelligence/Cost Pareto frontier of today's leading models Cost efficiency is becoming a primary factor in evaluating model performance. Fable 5 from @AnthropicAI leads the Index at 60 but averages $2.75 Cost per Task. Grok 4.5 (high) from @elonmusk's @SpaceXAI scores 54 on the Artificial Analysis Intelligence Index but at $0.31 is ~9x cheaper and also sits on the Pareto frontier. DeepSeek v4 Flash is again lower in intelligence at 44 but is ~69x cheaper than Fable at $0.04 Cost per Task. The Pareto frontier is the set of models that no other model beats on both intelligence and cost at their respective positions. Everything else is paying more for less.