Macroeconomics

Weekly Market Monitor

September 25, 2026 | 3 minute read
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Stay connected with our Weekly Market Monitor, featuring a thematic chart, key market developments, and valuable investment insights across asset classes each week.

Chart of the Week: Falling Costs, Rising Adoption

Facing competition from Chinese open-source alternatives, leading US AI companies have started to unveil new, cheaper AI models. In particular, Meta’s Muse Glimmer and Open AI’s GPT-6 Luna have significantly lower costs than the frontier models, even undercutting some of the new open-source Chinese models, such as Xiaomi’s MiMo-V2.6-Pro. Notably, we are seeing early signs that declining costs are driving increased AI spending, demonstrating how AI companies may sustain strong earnings growth even if margins come under pressure.

Source: Artificial Analysis and Goldman Sachs Asset Management. As of September 23, 2026. Chart shows the weighted average cost (USD) per Artificial Analysis Intelligence Index task for a wide range of AI models. ‘We’ refers to Goldman Sachs Asset Management. For Illustrative Purposes Only. Please see additional disclosures at the end of this presentation.

Download the full document, which includes the chart of the week and insights on market developments. On pages 3 and 4, we further recap equity sector, size and style returns, global index returns, as well as rates and spread movements and a monthly snapshot of global equity valuations.

Weekly Market Monitor
The Market Monitor features a thematic chart and highlights key economic events and data releases driving the past week’s market moves.
weekly market monitor
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