ChatGPT Ads changes bidding: Target CPA and CPC replace Max Bid by January

ChatGPT Ads introduced two new bidding strategies on 9 November 2026: Target CPA for conversion campaigns and Target CPC for click campaigns. Advertisers thereby set a target average price for purchases, leads or clicks. The system calculates the individual auction bids itself. By 1 January 2027 at the latest, the existing Max Bid and Max CPC options will also disappear from existing campaigns.

For performance teams, this is a practical change: instead of setting a cap on every auction, they define a cost and results goal. This is especially relevant for businesses in Germany, since ChatGPT Ads was expanded to European markets in August. Our article on ChatGPT Ads in 89 countries gives an overview of availability.

From a maximum bid to a cost target

Max CPC previously limited the bid per click. With the new Target CPC, the system may bid higher or lower in an individual auction in order to approach the desired average cost per click across the campaign. The same principle applies to Target CPA, for the price of a defined conversion, such as an order or a qualified inquiry.

For example: an online shop recently spent 400 euros of advertising budget on ten orders, and its measured CPA is 40 euros. A target value of 20 euros does not automatically make the next orders half as expensive. What matters is the users actually reachable, the competition, and the conversion signals the campaign receives back.

OpenAI is renaming the existing automatic strategy "Maximize Results (Autobid)" to Intelligent Bidding. Here the change concerns the name, not the basic way it works. New conversion campaigns with a specific cost limit have been using Target CPA since 9 November; Target CPC is available for click campaigns.

18 November is the more important date for agency tools

If you manage campaigns through an API or external management software, take a closer look. OpenAI is introducing dedicated fields for Target CPA and Target CPC. From 18 November 2026, the old Max Bid and Max CPC fields will, for certain new or changed campaign configurations, be interpreted as average cost targets – no longer as auction caps.

This is more than a new field name. An integration that passes an existing maximum amount on without adjustment could unintentionally trigger a different bidding logic. The old API fields remain supported until 31 December; from 1 January 2027 they will be deprecated. For agencies and adtech teams, testing the field population therefore belongs on the November list.

Without conversion data, automatic bidding becomes flying blind

Target CPA only works well if purchases or leads flow back as usable events. OpenAI recommends Pixel and/or Conversions API for this, along with monitoring the Event Quality Score. Targets set too tightly or missing signals can cause campaigns to deliver less and leave budget unspent.

This shifts day-to-day work from manual bid limits to the quality of measurement: Is the conversion event correct, is attribution right, what about delay, and does it reflect actual customer value? For marketers still testing the channel, our article on the measurement gaps in ChatGPT Ads is a sensible starting point. How AI-driven recommendations are changing sales attribution overall is also shown in the IAB blueprint on AI attribution.

What retailers should check now

First: evaluate existing campaigns based on their actual CPA and CPC values before setting new target costs. Second: for conversion goals, check whether the pixel or Conversions API is really receiving events. Third: switch external ads managers and API automations to the new field semantics before the 18 November.

There are also improvements in how advertised items are selected for product feeds. For fine-grained geographic targeting, however, it is worth checking the current documentation: for newly created product feed campaigns, OpenAI currently only offers targeting and exclusions at the country level. Standard campaigns offer additional location options depending on the market.

The direction is clear: ChatGPT Ads is moving closer to established performance platforms in campaign management. Whether a target CPA actually becomes cheaper will be decided afterwards in measurement, product offering and campaign operations – not by renaming the bidding strategy.

Sources: OpenAI: bidding strategies and pricing logic · OpenAI: campaigns from product feeds · OpenAI: expansion of ChatGPT Ads in Europe · Search Engine Land, 12. November 2026.