OpenAI has changed the bidding system in ChatGPT Ads. As of November 9, 2026, advertisers can set a target average cost per conversion or click instead of a maximum bid for each auction. For new campaigns, Target CPA replaces Max Bid, while Target CPC replaces Max CPC. Support for the old strategies will end entirely on January 1, 2027. This changes the central principle of ad management: advertisers define their desired campaign economics, and the system selects bids on its own.
Key Takeaways
- On November 9, 2026, OpenAI introduced Target CPA for new conversion campaigns and Target CPC for click-focused campaigns.
- Target CPA and Target CPC are average-cost targets, not guaranteed price caps.
- The system may bid above or below the specified Target CPC in individual auctions.
- Existing campaigns using Max Bid and Max CPC can continue operating under the old rules until January 1, 2027.
- A separate transition phase for API integrations begins on November 18, 2026.
- Overly low targets and weak conversion signals may limit ad delivery and leave part of the budget unspent.
What Has Changed in ChatGPT Ads Bidding
On November 5, OpenAI emailed advertisers about updates to its bidding strategies. The changes took effect on November 9, and the company explained how they work in its official Help Center.
Previously, advertisers could set a maximum bid to participate in an auction. For new campaigns with target costs per result, OpenAI now offers two strategies:
- Target CPA. For campaigns aimed at generating conversions, such as purchases or leads. The advertiser specifies the desired average cost per conversion.
- Target CPC. For campaigns focused on driving traffic. The advertiser specifies the desired average cost per click.
In both cases, OpenAI calculates bids for individual auctions automatically, taking into account the likelihood of achieving the desired result and the available budget.
This does not mean that the automation already available is being abandoned entirely. The Maximize Results (Autobid) strategy has been renamed Intelligent bidding. As before, it lets the system pursue results within the budget without setting a target CPA or CPC.
A $2 Target CPC Does Not Mean Every Click Will Cost $2
The most important difference in the new system is that the target cost is no longer a cap on an individual bid.
If an advertiser sets a Target CPC of $2, OpenAI may submit a higher or lower bid in any given auction. The system will try to generate as many clicks as possible within the available budget while aiming for an average CPC close to the target.
The actual average CPC may also end up above or below $2. OpenAI explicitly notes that Target CPC does not guarantee a fixed price.
Target CPA works similarly. If an advertiser sets a target cost per purchase of $50, the system will try to approach that average, but it does not guarantee purchases at $50 or less.
After switching, advertisers therefore need to assess not just the target they set but also the actual average cost, number of results, and spend.
When Will Max Bid and Max CPC Be Discontinued?
OpenAI has provided a transition period so advertisers can update existing campaigns without immediately interrupting delivery.
- November 9, 2026. Target CPA and Target CPC become available in Ads Manager. New campaigns use the corresponding strategies instead of the old bid caps.
- Through December 31, 2026. Existing campaigns can continue using Max Bid or Max CPC unless advertisers migrate them sooner.
- January 1, 2027. Support for Max Bid and Max CPC ends. Target CPA replaces them for conversion campaigns, while Target CPC takes over for click campaigns.
Advertisers therefore do not need to urgently pause campaigns that were running before November 9. However, they should review their settings and prepare for the transition before the start of 2027.
API Integrations Have a Separate Deadline: November 18
The changes affect not only the Ads Manager interface but also partners that create or modify campaigns through the API.
OpenAI is adding separate Target CPA and Target CPC fields. Until November 18, the old Max Bid and Max CPC fields retain their previous behavior.
Starting November 18, the company recommends using the new fields. The old fields will remain available through December 31, but when creating a campaign or changing an ad group’s bidding type, their values will be interpreted as target average costs rather than maximum bids.
This is particularly important for agencies and teams with their own automation tools. If an integration continues passing the old parameters, their meaning may change without a corresponding update to the campaign management logic.
Why a Low Target CPA Can Stop Campaign Scaling
Automated bidding does not mean the algorithm can generate conversions at any price the advertiser enters.
OpenAI recommends basing targets on actual results from previous campaigns. If an advertiser spent $400 and recorded 10 attributed purchases, their average CPA would be $40.
Setting a Target CPA of $20 will not automatically make the system find purchases at half the cost. Instead, an overly restrictive target may reduce auction participation, limit impressions, and leave some of the budget unspent.
A lower CPA alone is therefore not proof of campaign improvement. If the cost per conversion falls but conversion volume declines even more sharply, business performance may deteriorate.
OpenAI advises evaluating three metrics together: actual spend, number of results, and average cost per result.
Target CPA Will Perform Worse Without Quality Conversion Data
For conversion campaigns, the new strategy depends on the signals advertisers send to ChatGPT Ads.
OpenAI supports Pixel and Conversions API. However, having an integration in place does not necessarily mean the system receives enough accurate events for optimization.
Before switching to Target CPA, advertisers should confirm that the selected event is actually reaching the data source connected to the campaign. They should also check the Event Quality Score (EQS) and any warnings about missing data, delays, or duplicate events.
One important nuance: a high EQS does not guarantee sufficient conversion volume. It reflects the quality of the information received, not the number of signals available to the algorithm.
This poses a potential risk for campaigns with small budgets. When conversions are scarce, the algorithm may lack enough data for stable optimization. At the same time, OpenAI has not published a universal minimum conversion threshold beyond which Target CPA is guaranteed to perform effectively.
Target CPA Does Not Mean Paying Per Conversion
The name of the strategy may give the false impression that advertisers pay only after a purchase or lead is generated.
In reality, the optimization objective and billing model are separate settings. A campaign can optimize for conversions while being billed for clicks or impressions, depending on its billing parameters.
This matters for spend forecasting: Target CPA provides a goal for the algorithm, but it does not turn an advertising campaign into guaranteed pay-for-results advertising.
ChatGPT Ads Is Becoming More Like Meta Ads and Google Ads
The shift toward target metrics should be viewed in the context of OpenAI’s evolving advertising platform.
ChatGPT Ads had already introduced impression, click, and conversion campaigns, along with its own measurement tools, Pixel, and Conversions API. UAGEEK covered these capabilities in detail in its guide to running ads in ChatGPT.
OpenAI is now taking another step toward a model familiar to advertisers using major performance platforms: rather than manually controlling each bid, advertisers give the system a target economic metric, and it decides how to participate in auctions.
That does not mean ChatGPT Ads algorithms are already as effective as those of Meta or Google. There are currently too few public independent comparisons to demonstrate an advantage for OpenAI’s new strategies.
At the same time, the development of Ads Manager shows that OpenAI is building a full advertising infrastructure rather than limiting itself to selling individual placements. UAGEEK has also covered Sponsored Agents and the possibilities for managing advertising through ChatGPT.
What Advertisers Should Do Before January 1, 2027
- Review existing campaigns. Identify where Max Bid and Max CPC are being used and record current performance.
- Calculate the actual CPA or CPC. Use consistent reporting periods and account for conversion attribution delays.
- Check Pixel and Conversions API. Make sure the relevant events are being received and that EQS warnings do not indicate critical problems.
- Set a realistic target. Avoid setting Target CPA or Target CPC far below actual performance without a sound reason to expect improvement.
- Compare cost and volume. After switching, assess not only the average cost per result but also conversion volume and actual budget utilization.
- Update API integrations. Add support for the new fields before the old parameters change behavior on November 18.
If a campaign is performing steadily, the transition can be scheduled during the migration period. However, leaving all settings unchecked until the old strategies are automatically discontinued is risky.
Conclusion
OpenAI is gradually shifting control of bidding in ChatGPT Ads from advertisers to the algorithm. Instead of specifying a maximum price for taking part in an auction, the platform now lets advertisers set a desired average cost per click or conversion.
For media buyers, this changes how campaigns are managed. The quality of conversion signals, the realism of targets, and analysis of actual results become more important.
The new strategies do not guarantee cheaper clicks or leads. Their effectiveness will depend on the specific campaign, the data available, and the algorithm’s ability to find suitable auction opportunities.
Sources for Verification
Sources for Verification
OpenAI Help Center — Bidding strategies and how pricing works in ChatGPT Ads. Official documentation covering Target CPA, Target CPC, Intelligent bidding, transition dates, API changes, cost per result, and conversion signal requirements.
ChatGPT Ads bidding strategies and pricing
Search Engine Roundtable, November 5, 2026. Coverage of OpenAI’s notice to advertisers about the launch of Target CPA and Target CPC and the discontinuation of Max Bid and Max CPC.
OpenAI’s announcement of the new bidding strategies
Search Engine Land, November 5, 2026. Independent trade publication coverage of ChatGPT Ads moving toward target cost per result.
Changes to ChatGPT Ads bidding options
