ChatGPT Ads bidding switches from bid caps to cost targets on Monday, November 9, 2026. Target CPA, an average cost per conversion you set, replaces Max Bid for new conversion campaigns, and Target CPC, an average cost per click you set, replaces Max CPC for new click campaigns, while existing campaigns keep their caps until January 1, 2027.
This explainer is part of the LLM advertising hub and is based on OpenAI's email to advertisers as published by Search Engine Roundtable on November 5, 2026. The recommendation: do not wait for the automatic switch. Move one campaign at a time, set each target from your recent actual cost rather than the old cap, and fix conversion signals first. For how the channel works overall, see the guide to ChatGPT Ads.
What changes in ChatGPT Ads bidding on November 9, 2026?
ChatGPT Ads bidding gets two cost target strategies on November 9, 2026: Target CPA for conversion campaigns and Target CPC for click campaigns. They replace Max Bid and Max CPC when you create a new campaign in Ads Manager. Existing campaigns keep serving on their caps and can be switched at any point before January 1, 2027.
Reported from OpenAI's email: "Starting Monday, November 9, you can optionally choose a cost target in Ads Manager when you create a campaign or update an existing one," OpenAI wrote, as quoted by Search Engine Roundtable. The email also renames Maximize results (autobid) to intelligent bidding.
Not yet in the help center: as of November 6, 2026, OpenAI's Maximize results help article still names "Manual: Max bid" as the alternative, so expect labels to change after November 9.
How bidding got here:
- May 5, 2026: OpenAI added cost per click buying next to CPM, and said it would "support more ways for advertisers to bid and optimize."
- June 5, 2026: conversion campaigns began rolling out, PPC Land reported.
- August 2026: Maximize results became the preselected strategy for eligible new ad groups, per PPC Land.
- November 9, 2026: Target CPA and Target CPC launch.
- January 1, 2027: Max Bid and Max CPC retire.
How do Target CPA and Target CPC work in ChatGPT Ads?
Target CPA and Target CPC in ChatGPT Ads are cost targets, not caps. You enter the average cost you want per conversion or per click, and OpenAI's system raises or lowers bids in each auction to hit that average across the campaign. Single auctions can cost more than the target, which a cap never allowed.
Target CPA (target cost per action) is a bid strategy where you set the average amount you want to pay for a conversion, such as a purchase or a lead. OpenAI says its "system adjusts bids and delivery toward that target," according to its advertiser email. The target can change how often your ads show, not only the price.
Target CPC (target cost per click) is a bid strategy where you set an average cost per click, and OpenAI aims to deliver as many clicks as possible from your budget while working toward that average. OpenAI's advertiser email draws the line clearly: "While Max CPC caps individual bids, Target CPC lets our system bid above or below your target in each auction."
Max CPC and Max Bid are manual ceilings on any single auction bid. Intelligent bidding is a strategy without a cost target that, per OpenAI's help center, "prioritizes result volume and does not guarantee delivery against a specific CPA."
Target CPA, Target CPC or intelligent bidding: which should you pick?
Pick Target CPA when the campaign optimizes for conversions and you know what a conversion is worth to you. Pick Target CPC when you buy clicks and need cost per click to stay near a known number. Pick intelligent bidding when you want maximum volume from a fixed budget and can accept that cost per result floats.
| Criterion | Target CPA | Target CPC | Intelligent bidding | Max Bid or Max CPC |
|---|---|---|---|---|
| Campaign goal | Conversions | Clicks | Clicks or conversions | Conversions (Max Bid) or clicks (Max CPC) |
| What you enter | Average cost per conversion | Average cost per click | Budget only | Ceiling per auction |
| Single auction can exceed your number | Yes | Yes | No number to exceed | No |
| Main risk | Too low a target limits delivery | Average CPC rises if you copy an old cap | Cost per result drifts | Retires January 1, 2027 |
| Needs working conversion signal | Yes, the selected event | Not for bidding | Yes, when optimizing for conversions | Yes, for conversion campaigns |
| Available for new campaigns | From November 9, 2026 | From November 9, 2026 | Yes | No, from November 9, 2026 |
A practical decision rule for each campaign:
- Known break-even CPA and steady conversions: Target CPA.
- Few conversions or an unreliable event: fix the signal first, then choose.
- Click campaign judged on traffic cost: Target CPC.
- Volume test on a fixed budget: intelligent bidding.
How do you set your first Target CPA or Target CPC?
Set your first Target CPA or Target CPC at the recent actual average cost of the campaign, not at the old bid cap and not at the cost you wish you had. OpenAI's own advice is to "use recent actual CPA or CPC to choose realistic targets," and it warns that restrictive targets can reduce delivery and leave budget unspent.
Call it the Actual Cost Anchor rule: the first target equals the actual average cost over the last 30 days, then you move it in small steps once the campaign delivers. It matters most for click campaigns, because ChatGPT Ads runs a relevance weighted second-price auction, per PPC Land, so the price you paid under Max CPC usually sat below the cap.
Hypothetical worked example, not real data: a click campaign has a Max CPC of $4.00 and paid an actual average of $2.60 per click over the last 30 days. Typing $4.00 into Target CPC tells the system that an average of $4.00 is acceptable, so the same budget can buy about 35% fewer clicks. Under the Actual Cost Anchor rule the first Target CPC is $2.60.
The same holds for conversions: an actual CPA of $55 means a first Target CPA of $55, lowered toward break-even only once the campaign spends its budget.
What should you do before Max Bid and Max CPC retire on January 1, 2027?
Before January 1, 2027, move every ChatGPT Ads campaign that still runs on Max Bid or Max CPC to a target you chose yourself. OpenAI will otherwise switch those campaigns to Target CPA or Target CPC automatically, and its email does not say which target value the automatic switch will use.
- List every campaign and its current strategy. Mark which ones use Max Bid, Max CPC or Maximize results.
- Pull actual costs. Note the actual average CPA or CPC per campaign over the last 30 days, next to the old cap.
- Check the conversion event. Confirm the Pixel or Conversions API sends the selected event to the data source linked to each conversion campaign, and clear any Event Quality Score warnings.
- Switch one campaign first. From November 9, set its target at the actual average cost of the last 30 days (the Actual Cost Anchor rule).
- Watch spend and delivery. If the campaign stops spending its budget, raise the target before you conclude the strategy does not work.
- Move the rest in batches. Finish before January 1, 2027, so no campaign gets a value you did not choose.
The email does not mention ChatGPT Ads product feed campaigns or impression based buying, so check those campaigns in your own Ads Manager after November 9.
Why do conversion signals matter before you switch to Target CPA?
Conversion signals matter because Target CPA can only steer toward a cost per conversion it can measure. If the Pixel or Conversions API misses or duplicates the selected event, the system optimizes toward the wrong number, and OpenAI warns that weak conversion signals can reduce ad delivery and leave budget unspent.
A conversion signal is the event data, such as a purchase or lead sent through OpenAI's Pixel or Conversions API, that tells the bidding system which ad clicks led to a result. OpenAI's email asks conversion advertisers to confirm that the Pixel or Conversions API "is sending the selected event to the data source linked to your campaign" and to use Event Quality Score (EQS) warnings to find gaps. Event Quality Score is OpenAI's rating of how well your conversion events arrive, and the email points to its warnings. OpenAI has not published how the score is calculated as of November 2026.
Two details from earlier reporting affect what Target CPA sees. View-through conversions, added in August 2026, sit outside bidding and CPA calculation, PPC Land reported. And OpenAI documents no minimum conversion volume or learning period for Target CPA. Setup, deduplication and GA4 checks are covered in the guide to ChatGPT Ads conversion tracking.
How does ChatGPT Ads bidding compare with Smart Bidding in Google Ads?
ChatGPT Ads bidding now mirrors Smart Bidding in Google Ads: you set an average target and the system sets each auction bid. Google's Target CPA works the same way and accepts that "some conversions may cost more than your target and some may cost less." The difference is documentation depth, which is far greater on Google's side.
Smart Bidding is the group of automated Google Ads bid strategies, such as Target CPA and Target ROAS, that use Google AI to set a bid in each auction toward a conversion or value goal, per Google Ads Help. Google's Target CPA help page states that advertisers "can start using Target CPA with no conversion history" and offers portfolio strategies and ad group targets. Starting in June 2026, Google labels "Maximize conversions with a Target CPA" simply as "Target CPA," the same name OpenAI now uses.
Microsoft Advertising moved the same way. From October 1, 2026, new non-portfolio campaigns using Max Conversions, Max Conversion Value or Max Clicks no longer accept Max CPC, and Microsoft Ads Liaison Navah Hopkins said the cap "can lead to spend pacing irregularities," per PPC Land. For the value based version of the same idea, see Target ROAS in Google Ads. For the cost comparison between the channels, see ChatGPT Ads vs Google Ads.
Common mistakes with ChatGPT Ads bidding
Common mistakes with ChatGPT Ads bidding during this transition come from treating a target like a cap and from leaving the switch to OpenAI. Each one either raises your average cost or stops delivery, and each is easier to prevent before January 1, 2027 than to diagnose afterward in reporting.
- Copying Max CPC into Target CPC. The old cap was a ceiling, not your average. Start from the actual average CPC.
- Setting a target below recent actual CPA. A target far under what the campaign achieves can stop it from spending. Start at the actual CPA and lower in steps.
- Switching before the event is clean. Target CPA optimizes the selected event as measured. Fix Pixel or Conversions API gaps and EQS warnings first.
- Waiting for the automatic switch. OpenAI has not said which target value it will apply on January 1, 2027. Choose it yourself.
- Changing every campaign on the same day. Move one campaign first so you can tell a target problem from a seasonal dip.
- Ignoring the budget setting. With Max CPC gone, the budget is your main control on spend. Set it at what you are willing to lose in a test.
