ChatGPT car ads: affiliates outbid Geico, Tesla, and Ford
Geico, Progressive, Tesla, and Ford appear in the prompts. None of them appear in the ad slots. Affiliates are.
Auto marketers assume ChatGPT's ad surface is crowded with car brands. The data says otherwise. Autotrader, a lead-gen affiliate, holds the top spot with 32 placements. Expert Market, another affiliate, sits at number two with 24. Geico, Progressive, Tesla, and Ford do not appear in the top 10 advertisers for car queries.
Two affiliate lead-gen sites (Autotrader 11.99%, Expert Market 8.99%) hold 20.98% of all Automotive & Mobility placements. The only true auto brand on the leaderboard is CarMax at rank 10 with 1.87%.
Autotrader and Expert Market are lead-gen affiliates. They buy branded comparison traffic and monetize the form-fill, the same playbook that has shaped Google auto insurance results for a decade. It is now replaying on ChatGPT, earlier than most brands expected. Whoever shows up first to the comparison prompts sets the template for the next several years.
- Others (91 advertisers)59%
- Autotrader12%
- Expert Market9%
- Fleet Hoster LLC3%
- BestMoney3%
- Others13%
Supply is B2B, demand is B2C
The largest supply cluster is batteries, simulation, modeling. It spans 59 placements across 29 advertisers and reads as B2B tooling by keyword. Yet the prompts triggering these creatives are dominated by B2C car comparisons: 'Geico vs Progressive', 'Tesla vs Ford', 'Kia vs Hyundai'. Off-niche giants like Mastercard and Analog Devices are buying in a niche whose top prompts are shopper queries, a clear inventory mismatch. Fleet Hoster LLC anchors the fleet-tech supply cluster and surfaces alongside consumer fleet questions. The keywords the bidders optimized for do not line up with the intent of the prompts.
Fourteen prompts, and almost every one falls into one of two buckets: B2C brand-versus-brand comparisons a shopper runs before a purchase, or B2B research-platform lookups ('agentic research platform for automotive brands', 'automotive-specific research community', 'alternatives to Magna'). The B2C bucket is where the consumer spend lives. The B2B bucket is what the supply clusters are actually optimized for. The two rarely overlap.
Supply: 59 placements on battery, simulation, modeling (B2B), bid by 29 advertisers. Demand: Geico vs Progressive, Tesla vs Ford, Kia vs Hyundai (B2C). Only one auto brand (CarMax) sits in the top 10. Mastercard and Analog Devices are the heaviest off-niche buyers.
What this means for auto advertisers
The bid pressure is concentrated where the demand is most explicit. Insurance comparison queries name four competing insurers in a single prompt, and not one insurer has bid. An insurer matching Expert Market's 24 placements against the full-coverage insurance prompt alone would land at rank 2 in this niche. The same gap repeats on EV crossovers, 3-row SUVs, and compact SUV comparisons, where every prompt names three or four rival brands and the affiliate leaderboard stays unfilled. The campaigns currently running confirm it: six active ChatGPT campaigns (Scale Army, Carta, All Aware, two DataCamp, Very LLC) and not one belongs to an OEM, insurer, or dealer group.
The brands named in the prompt are not the brands buying the answer. That gap will not stay open once Q4 auto budgets reset.
We probe ChatGPT with realistic consumer prompts and capture the sponsored ad cards it returns — every creative, the triggering prompt, and the advertiser. Figures reflect our captured sample, not OpenAI's internal data. Explore the live ad library and market intelligence.