{"license":"https://creativecommons.org/licenses/by/4.0/","dataset":"markets","count":1,"filters":{"market":"us-ai-assistant-usage","matched":true,"marketId":"mkt-ai-chatbot","slug":"us-ai-assistant-usage","name":"U.S. generative AI assistant usage"},"rows":[{"id":"mkt-ai-chatbot","slug":"us-ai-assistant-usage","name":"U.S. generative AI assistant usage","shortName":"AI assistants","geography":"United States","sector":"Digital platforms","dataVintage":"2026","naicsCode":"518210","industryHref":"/industries/518210","crosswalkHref":"/markets/economy?bridgeMarket=us-ai-assistant-usage&bridgeNaics=518210#market-industry-crosswalk","latestHhi":4804,"concentrationClass":"highly_concentrated","cr4":94.8,"topFirmShare":67.13,"hhiAtOrAbove2500":true,"hhiDisclosureGap":false,"dataStatus":"estimated_public","confidenceLevel":"medium","sourceCount":1,"policySourceCount":2,"policyEventCount":2,"reportCount":2,"briefAction":"Test whether the dominant firm controls access, switching, pricing, defaults, distribution, or other chokepoints that weaken consumer choice.","briefActionLevel":"Immediate review","briefChange":"The profile currently has one comparable concentration snapshot, so no direction is assigned.","briefComparisonDelta":null,"briefComparisonDirection":"unavailable","briefComparisonFromYear":null,"briefComparisonMetric":null,"briefComparisonToYear":null,"briefEvidence":"3 records in the evidence custody chain, 6 latest share rows, 2 linked official records, and 2 related briefs support this profile. Status is estimated public with medium confidence.","briefEvidenceState":"measured_hhi","briefGuardrail":"This brief summarizes the observatory's published market screen. It does not define a legal antitrust market, establish market power, identify anticompetitive conduct, estimate consumer harm, or convert descriptive concentration into a causal claim.","briefHeadline":"AI assistants: highly concentrated in the latest public screen.","briefHref":"/markets/us-ai-assistant-usage#overview","briefQuestion":"Does the observed usage structure persist in revenue, switching, access, quality, and conduct evidence under a legally relevant market definition?","briefSourceIds":"statcounter-ai-chatbot-us-2026|ftc-ai-partnerships-report-2025|doj-google-search-remedies-2025","briefStructure":"The latest 2026 screen reports HHI 4,804, classified as highly concentrated. ChatGPT leads the sourced distribution at 67.1%. The four largest named participants account for 94.8%."}]}