OpenAI has changed how bidding works in ChatGPT Ads. As of November 9, 2026, advertisers can use Target CPA to optimize for conversions and Target CPC to drive clicks. Rather than limiting bids in individual auctions, the system aims for a desired average cost per result and sets bids automatically.
For media buyers, this changes the approach to controlling advertising costs. The target cost is no longer a hard cap, and campaign performance depends more heavily on the quality of conversion data. In addition, OpenAI will permanently retire the previous Max Bid and Max CPC strategies on January 1, 2027.
Key Takeaways
- Starting November 9, Target CPA replaces Max Bid for new conversion campaigns, while Target CPC replaces Max CPC for click campaigns.
- Target CPA and Target CPC specify the desired average cost per result but do not guarantee that the target will be met.
- Existing campaigns can temporarily continue using the old strategies until they are discontinued on January 1, 2027.
- Maximize Results (Autobid) has been renamed Intelligent bidding and continues to optimize bids automatically.
- From November 18, legacy bidding fields in the API will behave differently when campaigns are created or bidding types are changed.
- Setting a target CPA or CPC too low can limit ad delivery and leave part of the budget unspent.
How Target CPA and Target CPC Work in ChatGPT Ads
The main difference between the new strategies is the shift from controlling the maximum bid to optimizing the average cost per result. Advertisers define an economic objective, while the algorithm estimates the likelihood of a click or conversion and manages participation in auctions on its own.
Target CPA: Optimizing the Cost per Conversion
Target CPA (Target Cost per Action) is designed for campaigns focused on specific user actions: purchases, leads, registrations, or other supported conversion events.
For example, an advertiser sets a Target CPA of $50. The system attempts to generate conversions at an average cost of around $50, adjusting auction bids according to the predicted likelihood of an outcome.
This does not mean that every conversion will cost exactly $50. Individual results may be more or less expensive, and the actual average CPA may also deviate from the specified target.
Target CPC: Controlling the Average Cost per Click
Target CPC (Target Cost per Click) works on a similar principle but optimizes campaigns for clicks. Unlike Max CPC, which capped the maximum bid, the new strategy allows the algorithm to set auction bids above or below the specified target.
If an advertiser sets a Target CPC of $2, the system may bid more in promising auctions and less in less attractive ones. The goal is to generate as many clicks as possible within the budget while approaching the desired average cost.
It is important to distinguish the target cost from actual spending. Even the campaign’s final average CPC will not necessarily equal the configured Target CPC.
What Happens to Max Bid, Max CPC, and Intelligent Bidding?
OpenAI has provided a transition period for advertisers already using the old strategies. Campaigns with Max Bid and Max CPC can continue running with their existing settings through the end of 2026, unless the advertiser switches them to a new strategy sooner.
As of January 1, 2027, Max Bid and Max CPC will no longer be supported. Target CPA will replace them for conversion campaigns, and Target CPC for click campaigns.
At the same time, the automated Maximize Results (Autobid) strategy is not going away. It has been renamed Intelligent bidding and will continue managing bids to achieve results within the advertising budget without requiring a target CPA or CPC.
Advertisers can therefore choose between automated optimization without a specific target cost and optimization with a defined cost-per-result benchmark.
ChatGPT Ads API Bidding Behavior Changes on November 18
A separate stage of the transition affects advertisers and partners who create campaigns through the API. Here, the changes may affect not only the interface but also the logic of automated integrations.
- Before November 18, 2026: legacy Max Bid and Max CPC fields retain their previous behavior.
- From November 18: when creating a campaign or changing an ad group’s bidding type, using the old fields will activate the corresponding target-based strategy. The supplied value will be treated as an average-cost target rather than a maximum bid.
- Through December 31: the old fields will remain supported, although OpenAI recommends using the new Target CPA and Target CPC fields.
- From January 1, 2027: the deprecated API fields will be retired.
This is especially important for agencies, proprietary advertising platforms, and teams that manage campaigns programmatically. Sending the same numerical value through a legacy field after November 18 may now trigger a different optimization logic.
Why Target CPA Does Not Guarantee Profitable Advertising
The new strategy gives the algorithm greater freedom in auctions, but it does not eliminate the constraints of advertising economics. If a campaign has historically generated conversions at $40 each, setting a Target CPA of $20 does not mean the system will automatically cut the actual acquisition cost in half.
Instead, a target that is too restrictive may reduce the number of auctions the system is willing to enter. This can lead to fewer impressions, lower conversion volume, and incomplete budget utilization.
Another risk is inaccurate performance signals. If the system does not receive enough reliable conversion data, its ability to predict the effectiveness of ad impressions is limited.
It is also worth remembering that Target CPA does not mean paying exclusively for conversions. OpenAI distinguishes between the optimization strategy and the billing model: depending on the conversion campaign’s settings, advertisers may pay for clicks or impressions.
What Media Buyers Should Check Before Switching
Switching to the new strategies involves more than simply replacing Max Bid with a desired CPA. OpenAI recommends first evaluating actual campaign performance and checking the quality of optimization signals.
- Check OpenAI Pixel and Conversions API. Make sure the required conversion event reaches the data source associated with the campaign.
- Review Event Quality Score and Diagnostics. Resolve warnings about data quality, missing events, and problems with signal transmission.
- Calculate the actual CPA or CPC. Use a comparable reporting period and account for delays in conversion reporting.
- Compare the cost per result with the offer’s economics. For conversion campaigns, consider the acceptable acquisition cost, profit margin, and value of the resulting action.
- Test new targets gradually. After changing strategies, monitor spending, the number of results, the actual average cost, and impression trends.
- Check API integrations. This is especially important if campaigns are created or edited automatically through third-party services.
For performance teams, the practical benchmark is not just hitting a target CPA but also generating sufficient volume. A campaign with a low cost per conversion that barely receives impressions is not necessarily more effective than one with a higher CPA and a steady volume of profitable acquisitions.
What Else Has Changed in OpenAI’s Advertising Platform?
Bidding updates are not the only changes to ChatGPT Ads in November. According to a November 12 report by Search Engine Land, OpenAI has also expanded the settings available for product-feed campaigns.
Those campaigns now have more detailed geographic targeting options for regions or individual markets within a country. Advertisers can also combine multiple filtering conditions for a single product-feed field, allowing them to define the product assortment for an ad group more precisely.
These features broaden control over product advertising, but they do not mean ChatGPT Ads is automatically available in every country. Access to Ads Manager and the geographic availability of ad delivery remain separate issues.
For Ukrainian advertisers, we previously covered campaign launch requirements, campaign structure, and Ads Manager features in our article about advertising in ChatGPT in Ukraine.
What the Update Means for the Advertising Market
The move to Target CPA and Target CPC brings ChatGPT Ads management closer to the model familiar from performance marketing, in which advertisers define a business objective and the algorithm makes bidding decisions independently.
The potential advantage is less manual auction management and the ability to steer campaigns using economic metrics. At the same time, advertisers lose some direct control over individual bids and become more dependent on the system’s predictions and the quality of their analytics.
The next practical date for teams working through the API is November 18, 2026. For other advertisers, the key deadline is January 1, 2027, when the old bidding strategies will no longer be supported.
That is why preparing for the transition means setting up not only new target values but also a system for measuring results. The actual acquisition cost, conversion volume, and campaign profitability will show how well the new strategy meets business objectives.
Sources for Verification
Sources for Verification
OpenAI Help Center — Bidding strategies and how pricing works in ChatGPT Ads. Official confirmation of the launch of Target CPA and Target CPC, auction rules, transition dates, and API changes.
Official documentation on bidding strategies
OpenAI Help Center — Creating campaigns for ChatGPT Ads. Campaign objectives, billing models, budgets, and Ads Manager settings.
Documentation on creating ad campaigns
OpenAI Help Center — Conversion-optimized Campaigns. An explanation of conversion optimization, supported events, and the differences between paying for clicks and impressions.
Conversion campaign rules
Search Engine Land — ChatGPT Ads bidding options are changing on November 9th. A November 5, 2026 article detailing OpenAI’s notice to advertisers about the move to the new strategies.
Announcement of the bidding update
Search Engine Land — ChatGPT Ads adds Target CPA and CPC bidding, expands product campaign controls. A November 12, 2026 report on additional geographic targeting options and product-feed filtering features.
Overview of further ChatGPT Ads updates